Method and device for transmitting/receiving signal in wireless communication system

ABSTRACT

A method and a device for transmitting/receiving a signal in a wireless communication system, according to one embodiment of the present disclosure, comprise the steps of: determining a physical uplink control channel (PUCCH) resource for transmitting the PUCCH; and transmitting the PUCCH through the PUCCH resource. The PUCCH resource is determined to be one of 16 PUCCH resources in a PUCCH resource set. The PUCCH resource set is a PUCCH resource set for a state in which there is no dedicated PUCCH resource configuration in a terminal. The number of physical resource blocks (PRBs) of the PUCCH resource can be determined on the basis of a received system information block (SIB).

TECHNICAL FIELD

The present disclosure relates to a method and apparatus for use in awireless communication system.

BACKGROUND ART

Generally, a wireless communication system is developing to diverselycover a wide range to provide such a communication service as an audiocommunication service, a data communication service and the like. Thewireless communication is a sort of a multiple access system capable ofsupporting communications with multiple users by sharing availablesystem resources (e.g., bandwidth, transmit power, etc.). For example,the multiple access system may include one of code division multipleaccess (CDMA) system, frequency division multiple access (FDMA) system,time division multiple access (TDMA) system, orthogonal frequencydivision multiple access (OFDMA) system, single carrier frequencydivision multiple access (SC-FDMA) system, and the like.

DISCLOSURE Technical Problem

The object of the present disclosure is to provide a method andapparatus for transmitting an uplink channel efficiently in a wirelesscommunication system.

It will be appreciated by persons skilled in the art that the objectsthat could be achieved with the present disclosure are not limited towhat has been particularly described hereinabove and the above and otherobjects that the present disclosure could achieve will be more clearlyunderstood from the following detailed description.

DISCLOSURE Technical Problem

The present disclosure provides a method and apparatus for transmittingand receiving a signal in a wireless communication system.

In one aspect of the present disclosure, provided herein is a method oftransmitting and receiving a signal by a user equipment (UE) operatingin a wireless communication system. The method may include determining aphysical uplink control channel (PUCCH) resource for transmitting thePUCCH, and transmitting the PUCCH through the PUCCH resource, whereinthe PUCCH resource may be determined as one of sixteen PUCCH resourcesin a PUCCH resource set, wherein the PUCCH resource set may be for theUE not having dedicated PUCCH resource configuration, wherein a numberof physical resource blocks (PRBs) in the PUCCH resource may bedetermined based on a received system information block (SIB).

In another aspect of the present disclosure, provided herein are adevice, a processor, and a storage medium for performing the signaltransmission/reception methods.

In the methods and devices, the PUCCH may be generated based on onePUCCH sequence of a length corresponding to the number of PRBs.

In the methods and devices, the PUCCH may be one of PUCCH formats 0 and1.

In the methods and devices, invalid PUCCH resources among the sixteenPUCCH resources may not be allocated.

In the methods and devices, validity of the PUCCH resource may bedetermined based on: (i) the number of PRBs in the PUCCH resource; (ii)a total number of RBs in a bandwidth; and (iii) a set of initial cyclicshift (CS) indexes corresponding to the PUCCH resource set.

The communication apparatus may include an autonomous driving vehiclecommunicable with at least a UE, a network, and another autonomousdriving vehicle other than the communication apparatus.

The above-described aspects of the present disclosure are only some ofthe preferred embodiments of the present disclosure, and variousembodiments reflecting the technical features of the present disclosuremay be derived and understood from the following detailed description ofthe present disclosure by those skilled in the art.

Advantageous Effects

According to an embodiment of the present disclosure, a communicationapparatus may transmit an uplink channel more efficiently in a differentway from the prior art.

It will be appreciated by persons skilled in the art that the effectsthat can be achieved with the present disclosure are not limited to whathas been particularly described hereinabove and other advantages of thepresent disclosure will be more clearly understood from the followingdetailed description taken in conjunction with the accompanyingdrawings.

DESCRIPTION OF DRAWINGS

FIG. 1 illustrates a radio frame structure.

FIG. 2 illustrates a resource grid during the duration of a slot.

FIG. 3 illustrates a self-contained slot structure.

FIG. 4 illustrates an acknowledgment/negative acknowledgment (ACK/NACK)transmission process.

FIG. 5 illustrates a wireless communication system supporting anunlicensed band.

FIG. 6 illustrates an exemplary method of occupying resources in anunlicensed band.

FIGS. 7 and 8 are flowcharts illustrating channel access procedures(CAPs) for signal transmission in an unlicensed band.

FIG. 9 illustrates a resource block (RB) interlace.

FIGS. 10 to 22 are a diagram illustrating uplink (UL) channeltransmission according to the embodiments of the present disclosure.

FIGS. 23 to 26 illustrate devices according to an embodiment of thepresent disclosure.

BEST MODE

The following technology may be used in various wireless access systemssuch as code division multiple access (CDMA), frequency divisionmultiple access (FDMA), time division multiple access (TDMA), orthogonalfrequency division multiple access (OFDMA), single carrier frequencydivision multiple access (SC-FDMA), and so on. CDMA may be implementedas a radio technology such as universal terrestrial radio access (UTRA)or CDMA2000. TDMA may be implemented as a radio technology such asglobal system for mobile communications (GSM)/general packet radioservice (GPRS)/enhanced data rates for GSM evolution (EDGE). OFDMA maybe implemented as a radio technology such as institute of electrical andelectronics engineers (IEEE) 802.11 (wireless fidelity (Wi-Fi)), IEEE802.16 (worldwide interoperability for microwave access (WiMAX)), IEEE802.20, evolved UTRA (E-UTRA), and so on. UTRA is a part of universalmobile telecommunications system (UMTS). 3rd generation partnershipproject (3GPP) long term evolution (LTE) is a part of evolved UMTS(E-UMTS) using E-UTRA, and LTE-advanced (LTE-A) is an evolution of 3GPPLTE. 3GPP new radio or new radio access technology (NR) is an evolvedversion of 3GPP LTE/LTE-A.

For clarity of description, the present disclosure will be described inthe context of a 3GPP communication system (e.g., LTE and NR), whichshould not be construed as limiting the spirit of the presentdisclosure. LTE refers to a technology beyond 3GPP TS 36.xxx Release 8.Specifically, the LTE technology beyond 3GPP TS 36.xxx Release 10 iscalled LTE-A, and the LTE technology beyond 3GPP TS 36.xxx Release 13 iscalled LTE-A pro. 3GPP NR is the technology beyond 3GPP TS 38.xxxRelease 15. LTE/NR may be referred to as a 3GPP system. “xxx” specifiesa technical specification number. LTE/NR may be generically referred toas a 3GPP system. For the background technology, terminologies,abbreviations, and so on as used herein, refer to technicalspecifications published before the present disclosure. For example, thefollowing documents may be referred to.

3GPP NR

-   38.211: Physical channels and modulation-   38.212: Multiplexing and channel coding-   38.213: Physical layer procedures for control-   38.214: Physical layer procedures for data-   38.300: NR and NG-RAN Overall Description-   38.331: Radio Resource Control (RRC) protocol specification

FIG. 1 illustrates a radio frame structure used for NR.

In NR, UL and DL transmissions are configured in frames. Each radioframe has a length of 10 ms and is divided into two 5-ms half-frames.Each half-frame is divided into five 1-ms subframes. A subframe isdivided into one or more slots, and the number of slots in a subframedepends on a subcarrier spacing (SCS). Each slot includes 12 or 14OFDM(A) symbols according to a cyclic prefix (CP). When a normal CP isused, each slot includes 14 OFDM symbols. When an extended CP is used,each slot includes 12 OFDM symbols. A symbol may include an OFDM symbol(or a CP-OFDM symbol) and an SC-FDMA symbol (or a discrete Fouriertransform-spread-OFDM (DFT-s-OFDM) symbol).

Table 1 exemplarily illustrates that the number of symbols per slot, thenumber of slots per frame, and the number of slots per subframe varyaccording to SCSs in a normal CP case.

Table 1 SCS (15*2^u) N^(slot) _(symb) N^(frame,u) _(slot) N^(subframe,u)_(slot) 15 KHz (u=0) 14 10 1 30 KHz (u=1) 14 20 2 60 KHz (u=2) 14 40 4120 KHz (u=3) 14 80 8 240 KHz (u=4) 14 160 16 * N^(slot) _(symb):numberof symbols in a slot * N^(frame,u) _(slot): number of slots in a frame *N^(subframe,u) _(slot): numberof slots in a subframe

Table 2 illustrates that the number of symbols per slot, the number ofslots per frame, and the number of slots per subframe vary according toSCSs in an extended CP case.

Table 2 SCS (15*2^u) N^(slot) _(s) _(y) _(m) _(b) N^(frame,u) _(slot)N^(subframe,u) _(slot) 60 KHz (u=2) 12 40 4

In the NR system, different OFDM(A) numerologies (e.g., SCSs, CPlengths, and so on) may be configured for a plurality of cellsaggregated for one UE. Accordingly, the (absolute time) duration of atime resource (e.g., a subframe, a slot, or a transmission time interval(TTI)) (for convenience, referred to as a time unit (TU)) composed ofthe same number of symbols may be configured differently between theaggregated cells.

NR may support various numerologies (or subcarrier spacings (SCSs)) toprovide various 5 G services. For example, NR may support a wide area inconventional cellular bands for an SCS of 15 kHz and support a denseurban area and a wide carrier bandwidth with lower latency for an SCS of30 or 60 kHz. For an SCS of 60 kHz or above, NR may support a bandwidthhigher than 24.25 GHz to overcome phase noise.

NR frequency bands may be divided into two frequency ranges: frequencyrange 1 (FR1) and frequency range 2 (FR2). FR1 and FR2 may be configuredas shown in Table A6 below. FR 2 may mean a millimeter wave (mmW).

Table 3 Frequency Range designation Corresponding frequency rangeSubcarrier Spacing FR1 458 MHz - 71 25 MHz 15, 30, 60 kHz FR2 24250MHz - 52600 MHz 60, 120, 240 kHz

FIG. 2 illustrates a resource grid during the duration of one slot.

A slot includes a plurality of symbols in the time domain. For example,one slot includes 14 symbols in a normal CP case and 12 symbols in anextended CP case. A carrier includes a plurality of subcarriers in thefrequency domain. A resource block (RB) may be defined by a plurality of(e.g., 12) consecutive subcarriers in the frequency domain. A bandwidthpart (BWP) may be defined by a plurality of consecutive (physical) RBs((P)RBs) in the frequency domain and correspond to one numerology (e.g.,SCS, CP length, and so on). A carrier may include up to N (e.g., 5)BWPs. Data communication may be conducted in an active BWP, and only oneBWP may be activated for one UE. Each element in a resource grid may bereferred to as a resource element (RE), to which one complex symbol maybe mapped.

In a wireless communication system, a UE receives information from a BSin downlink (DL), and the UE transmits information to the BS in uplink(UL). The information exchanged between the BS and UE includes data andvarious control information, and various physical channels/signals arepresent depending on the type/usage of the information exchangedtherebetween. A physical channel corresponds to a set of resourceelements (REs) carrying information originating from higher layers. Aphysical signal corresponds to a set of REs used by physical layers butdoes not carry information originating from the higher layers. Thehigher layers include a medium access control (MAC) layer, a radio linkcontrol (RLC) layer, a packet data convergence protocol (PDCP) layer, aradio resource control (RRC) layer, and so on.

DL physical channels include a physical broadcast channel (PBCH), aphysical downlink shared channel (PDSCH), and a physical downlinkcontrol channel (PDCCH). DL physical signals include a DL referencesignal (RS), a primary synchronization signal (PSS), and a secondarysynchronization signal (SSS). The DL RS includes a demodulationreference signal (DM-RS), a phase tracking reference signal (PT-RS), anda channel state information reference signal (CSI-RS). UL physicalchannel include a physical random access channel (PRACH), a physicaluplink shared channel (PUSCH), and a physical uplink control channel(PUCCH). UL physical signals include a UL RS. The UL RS includes aDM-RS, a PT-RS, and a sounding reference signal (SRS).

FIG. 3 illustrates a structure of a self-contained slot.

In the NR system, a frame has a self-contained structure in which a DLcontrol channel, DL or UL data, a UL control channel, and the like mayall be contained in one slot. For example, the first N symbols(hereinafter, DL control region) in the slot may be used to transmit aDL control channel, and the last M symbols (hereinafter, UL controlregion) in the slot may be used to transmit a UL control channel. N andM are integers greater than or equal to 0. A resource region(hereinafter, a data region) that is between the DL control region andthe UL control region may be used for DL data transmission or UL datatransmission. For example, the following configuration may beconsidered. Respective sections are listed in a temporal order.

In the present disclosure, a base station (BS) may be, for example, agNode B (gNB).

UL Physical Channels/Signals PUSCH

A PUSCH may carry UL data (e.g., uplink shared channel (UL-SCH)transport block (TB)) and/or uplink control information (UCI). The PUSCHmay be transmitted based on a cyclic prefix orthogonal frequencydivision multiplexing (CP-OFDM) waveform or a discrete Fourier transformspread OFDM (DFT-s-OFDM) waveform. When the PUSCH is transmitted basedon the DFT-s-OFDM waveform, the UE may transmit the PUSCH by applyingtransform precoding. For example, when the transform precoding is notallowed (e.g., when the transform precoding is disabled), the UE maytransmit the PUSCH based on the CP-OFDM waveform. When the transformprecoding is allowed (e.g., when the transform precoding is enabled),the UE may transmit the PUSCH based on the CP-OFDM waveform orDFT-s-OFDM waveform. PUSCH transmission may be dynamically scheduled bya PDCCH (dynamic scheduling) or semi-statically scheduled by higherlayer signaling (e.g., RRC signaling) (and/or Layer 1 (L1) signaling(e.g., PDCCH)) (configured scheduling (CS)). Therefore, in the dynamicscheduling, the PUSCH transmission may be associated with the PDCCH,whereas in the CS, the PUSCH transmission may not be associated with thePDCCH. The CS may include PUSCH transmission based on a Type-1configured grant (CG) and PUSCH transmission based on a Type-2 CG. Forthe Type-1 CG, all parameters for PUSCH transmission may be signaled bythe higher layer. For the Type-2 CG, some parameters for PUSCHtransmission may be signaled by higher layers, and the rest may besignaled by the PDCCH. Basically, in the CS, the PUSCH transmission maynot be associated with the PDCCH.

PUCCH

A PUCCH may carry UCI. The UCI includes the following information.

Scheduling request (SR): The SR is information used to request a UL-SCHresource.

Hybrid automatic repeat and request acknowledgement) (HARQ-ACK): TheHARQ-ACK is a signal in response to reception of a DL signal (e.g.,PDSCH, SPS release PDCCH, etc.). The HARQ-ACK response may includepositive ACK (ACK), negative ACK (NACK), DTX (DiscontinuousTransmission), or NACK/DTX. The HARQ-ACK may be interchangeably usedwith A/N, ACK/NACK, HARQ-ACK/NACK, and the like. The HARQ-ACK may begenerated on a TB/CBG basis.

Channel Status Information (CSI): The CSI is feedback information on aDL channel. The CSI includes a channel quality indicator (CQI), a rankindicator (RI), a precoding matrix indicator (PMI), a precoding typeindicator (PTI), and so on.

Table 4 shows PUCCH formats. The PUCCH formats may be classifiedaccording to UCI payload sizes/transmission lengths (e.g., the number ofsymbols included in a PUCCH resource) and/or transmission structures.The PUCCH formats may be classified into short PUCCH formats (PUCCHformats 0 and 2) and long PUCCH formats (PUCCH formats 1, 3, and 4)according to the transmission lengths.

Table 4 PUCCH format Length in OFDM symbols N^(PUCCH) _(symb) Number ofbits Usage Etc 0 1-2 ≤2 HARQ, SR Sequence selection 1 4-14 ≤2 HARQ, [SR]Sequence modulation 2 1-2 >2 HARQ, CSI, [SR] CP-OFDM 3 4-14 >2 HARQ,CSI, [SR] DFT-s-OFDM (no UE multiplexing) 4 4-14 >2 HARQ, CSI, [SR]DFT-s-OFDM (Pre DFT OCC)

(0) PUCCH Format 0 (PF0)

-   Supportable UCI payload size: up to K bits (e.g., K = 2)-   Number of OFDM symbols included in one PUCCH: 1 to X symbols (e.g.,    X = 2)-   Transmission structure: only a UCI signal is configured with no    DM-RS, and a UCI state is transmitted by selecting and transmitting    one of a plurality of sequences.

(1) PUCCH Format 1 (PF1)

-   Supportable UCI payload size: up to K bits (e.g., K = 2)-   Number of OFDM symbols included in one PUCCH: Y to Z symbols (e.g.,    Y = 4 and Z = 14)-   Transmission structure: UCI and a DM-RS are configured in different    OFDM symbols based on time division multiplexing (TDM). For the UCI,    a specific sequence is multiplied by a modulation symbol (e.g., QPSK    symbol). A cyclic shift/orthogonal cover code (CS/OCC) is applied to    both the UCI and DM-RS to support code division multiplexing (CDM)    between multiple PUCCH resources (complying with PUCCH format 1) (in    the same RB).

(2) PUCCH Format 2 (PF2)

-   Supportable UCI payload size: more than K bits (e.g., K = 2)-   Number of OFDM symbols included in one PUCCH: 1 to X symbols(e.g., X    = 2)-   Transmission structure: UCI and a DMRS (DM-RS) are configured/mapped    in/to the same symbol based on frequency division multiplexing    (FDM), and encoded UCI bits are transmitted by applying only an    inverse fast Fourier transform (IFFT) thereto with no DFT.

(3) PUCCH Format 3 (PF3)

-   Supportable UCI payload size: more than K bits (e.g., K = 2)-   Number of OFDM symbols included in one PUCCH: Y to Z symbols (e.g.,    Y = 4 and Z = 14)-   Transmission structure: UCI and a DMRS are configured/mapped in/to    different symbols based on TDM. Encoded UCI bits are transmitted by    applying a DFT thereto. To support multiplexing between multiple    UEs, an OCC is applied to the UCI, and a CS (or interleaved    frequency division multiplexing (IFDM) mapping) is applied to the    DM-RS before the DFT.

(4) PUCCH Format 4 (PF4 or F4)

-   Supportable UCI payload size: more than K bits (e.g., K = 2)-   Number of OFDM symbols included in one PUCCH: Y to Z symbols (e.g.,    Y = 4 and Z = 14)-   Transmission structure: UCI and a DMRS are configured/mapped in/to    different symbols based on TDM. The DFT is applied to encoded UCI    bits with no multiplexing between UEs.

FIG. 4 illustrates an ACK/NACK transmission process. Referring to FIG. 4, the UE may detect a PDCCH in slot #n. The PDCCH includes DL schedulinginformation (e.g., DCI format 1_0 or DCI format 1_1). The PDCCHindicates a DL assignment-to-PDSCH offset, K0 and a PDSCH-to-HARQ-ACKreporting offset, K1. For example, DCI format 1_0 or DCI format 1_1 mayinclude the following information.

Frequency domain resource assignment: Indicates an RB set assigned to aPDSCH.

Time domain resource assignment: Indicates K0 and the starting position(e.g., OFDM symbol index) and length (e.g., the number of OFDM symbols)of the PDSCH in a slot.

PDSCH-to-HARQ_feedback timing indicator: Indicates K1.

After receiving a PDSCH in slot #(n+K0) according to the schedulinginformation of slot #n, the UE may transmit UCI on a PUCCH in slot#(n+K1). The UCI includes an HARQ-ACK response to the PDSCH. In the casewhere the PDSCH is configured to carry one TB at maximum, the HARQ-ACKresponse may be configured in one bit. In the case where the PDSCH isconfigured to carry up to two TBs, the HARQ-ACK response may beconfigured in two bits if spatial bundling is not configured and in onebit if spatial bundling is configured. When slot #(n+K1) is designatedas an HARQ-ACK transmission timing for a plurality of PDSCHs, UCItransmitted in slot #(n+K1) includes HARQ-ACK responses to the pluralityof PDSCHs.

1. Wireless Communication System Supporting Unlicensed Band

FIG. 5 illustrates an exemplary wireless communication system supportingan unlicensed band applicable to the present disclosure.

In the following description, a cell operating in a licensed band(L-band) is defined as an L-cell, and a carrier of the L-cell is definedas a (DL/LTL) LCC. A cell operating in an unlicensed band (U-band) isdefined as a U-cell, and a carrier of the U-cell is defined as a(DL/LTL) UCC. The carrier/carrier-frequency of a cell may refer to theoperating frequency (e.g., center frequency) of the cell. A cell/carrier(e.g., CC) is commonly called a cell.

When a BS and a UE transmit and receive signals on carrier-aggregatedLCC and UCC as illustrated in FIG. 5(a), the LCC and the UCC may beconfigured as a primary CC (PCC) and a secondary CC (SCC), respectively.The BS and the UE may transmit and receive signals on one UCC or on aplurality of carrier-aggregated UCCs as illustrated in FIG. 5(b). Inother words, the BS and UE may transmit and receive signals only onUCC(s) without using any LCC. For an SA operation, PRACH, PUCCH, PUSCH,and SRS transmissions may be supported on a UCell.

Signal transmission and reception operations in an unlicensed band asdescribed in the present disclosure may be applied to theafore-mentioned deployment scenarios (unless specified otherwise).

Unless otherwise noted, the definitions below are applicable to thefollowing terminologies used in the present disclosure.

Channel: a carrier or a part of a carrier composed of a contiguous setof RBs in which a channel access procedure (CAP) is performed in ashared spectrum.

Channel access procedure (CAP): a procedure of assessing channelavailability based on sensing before signal transmission in order todetermine whether other communication node(s) are using a channel. Abasic sensing unit is a sensing slot with a duration of T_(s1)= 9 us.The BS or the UE senses the slot during a sensing slot duration. Whenpower detected for at least 4 us within the sensing slot duration isless than an energy detection threshold X_(thresh), the sensing slotduration T_(s1) is be considered to be idle. Otherwise, the sensing slotduration T_(s1) is considered to be busy. CAP may also be called listenbefore talk (LBT).

Channel occupancy: transmission(s) on channel(s) from the BS/UE after aCAP.

Channel occupancy time (COT): a total time during which the BS/UE andany BS/UE(s) sharing channel occupancy performs transmission(s) on achannel after a CAP. Regarding COT determination, if a transmission gapis less than or equal to 25 us, the gap duration may be counted in aCOT. The COT may be shared for transmission between the BS andcorresponding UE(s).

DL transmission burst: a set of transmissions without any gap greaterthan 16 us from the BS. Transmissions from the BS, which are separatedby a gap exceeding 16 us are considered as separate DL transmissionbursts. The BS may perform transmission(s) after a gap without sensingchannel availability within a DL transmission burst.

UL transmission burst: a set of transmissions without any gap greaterthan 16 us from the UE. Transmissions from the UE, which are separatedby a gap exceeding 16 us are considered as separate UL transmissionbursts. The UE may perform transmission(s) after a gap without sensingchannel availability within a DL transmission burst.

Discovery burst: a DL transmission burst including a set of signal(s)and/or channel(s) confined within a window and associated with a dutycycle. The discovery burst may include transmission(s) initiated by theBS, which includes a PSS, an SSS, and a cell-specific RS (CRS) andfurther includes a non-zero power CSI-RS. In the NR system, the discoverburst includes may include transmission(s) initiated by the BS, whichincludes at least an SS/PBCH block and further includes a CORESET for aPDCCH scheduling a PDSCH carrying SIB1, the PDSCH carrying SIB1, and/ora non-zero power CSI-RS.

FIG. 6 illustrates a resource occupancy method in a U-band. According toregional regulations for U-bands, a communication node in the U-bandneeds to determine whether a channel is used by other communicationnode(s) before transmitting a signal. Specifically, the communicationnode may perform carrier sensing (CS) before transmitting the signal soas to check whether the other communication node(s) perform signaltransmission. When the other communication node(s) perform no signaltransmission, it is said that clear channel assessment (CCA) isconfirmed. When a CCA threshold is predefined or configured by higherlayer signaling (e.g., RRC signaling), the communication node maydetermine that the channel is busy if the detected channel energy ishigher than the CCA threshold. Otherwise, the communication node maydetermine that the channel is idle. The Wi-Fi standard (802.11ac)specifies a CCA threshold of -62 dBm for non-Wi-Fi signals and a CCAthreshold of -82 dBm for Wi-Fi signals.When it is determined that thechannel is idle, the communication node may start the signaltransmission in a UCell. The sires of processes described above may bereferred to as Listen-Before-Talk (LBT) or a channel access procedure(CAP). The LBT, CAP, and CCA may be interchangeably used in thisdocument.

Specifically, for DL reception/UL transmission in a U-band, at least oneof the following CAP methods to be described below may be employed in awireless communication system according to the present disclosure.

DL Signal Transmission Method in U-Band

The BS may perform one of the following U-band access procedures (e.g.,CAPs) for DL signal transmission in a U-band.

Type 1 DL CAP Method

In the Type 1 DL CAP, the length of a time duration spanned by sensingslots sensed to be idle before transmission(s) may be random. The Type 1DL CAP may be applied to the following transmissions:

-   Transmission(s) initiated by the BS including (i) a unicast PDSCH    with user plane data or (ii) a unicast PDCCH scheduling user plane    data in addition to the unicast PDSCH with user plane data, or-   Transmission(s) initiated by the BS including (i) a discovery burst    only or (ii) a discovery burst multiplexed with non-unicast    information.

FIG. 7 is a flowchart illustrating CAP operations performed by a BS totransmit a DL signal in a U-band.

Referring to FIG. 7 , the BS may sense whether a channel is idle forsensing slot durations of a defer duration T_(d). Then, if a counter Nis zero, the BS may perform transmission (S1234). In this case, the BSmay adjust the counter N by sensing the channel for additional sensingslot duration(s) according to the following steps:

Step 1) (S1220) The BS sets N to N_(init) (N = N_(init)), where Ninit isa random number uniformly distributed between 0 and CW_(p). Then, step 4proceeds.

Step 2) (S1240) If N>0 and the BS determines to decrease the counter,the BS sets N to N-1 (N=N-1).

Step 3) (S1250) The BS senses the channel for the additional sensingslot duration. If the additional sensing slot duration is idle (Y), step4 proceeds. Otherwise (N), step 5 proceeds.

Step 4) (S1230) If N=0 (Y), the BS terminates the CAP (S1232). Otherwise(N), step 2 proceeds.

Step 5) (S1260) The BS senses the channel until either a busy sensingslot is detected within an additional defer duration T_(d) or all theslots of the additional defer duration T_(d) are detected to be idle.

Step 6) (S1270) If the channel is sensed to be idle for all the slotdurations of the additional defer duration T_(d) (Y), step 4 proceeds.Otherwise (N), step 5 proceeds.

Table 8 shows that m_(p), a minimum contention window (CW), a maximumCW, a maximum channel occupancy time (MCOT), and an allowed CW size,which are applied to the CAP, vary depending on channel access priorityclasses.

Table 8 Channel Access Priority Class ( p ) m_(p) CW_(min,p) CW_(max,p)T_(mcot,p) allowed CW_(p) sizes 1 1 3 7 2 ms {3,7} 2 1 7 15 3 ms {7,15}3 3 15 63 8 or 10 ms {15,31,63} 4 7 15 1023 8 or 10 ms{15,31,63,127,255,511,1023}

The defer duration T_(d) is configured in the following order: durationT_(f) (16 us) + m_(p) consecutive sensing slot durations T_(s1) (9 us).T_(f) includes the sensing slot duration T_(s1) at the beginning of the16-us duration.

The following relationship is satisfied: CW_(min,p)<= CW_(p) <=CW_(max,) _(p). CW_(p) may be initially configured by CW_(p) =CW_(min,p) and updated before step 1 based on HARQ-ACK feedback (e.g.,ACK or NACK) for a previous DL burst (e.g., PDSCH) (CW size update). Forexample, CW_(p) may be initialized to CW_(min,p) based on the HARQ-ACKfeedback for the previous DL burst. Alternatively, CW_(p) may beincreased to the next highest allowed value or maintained as it is.

Type 2 DL CAP Method

In the Type 2 DL CAP, the length of a time duration spanned by sensingslots sensed to be idle before transmission(s) may be determined. TheType 2 DL CAP is classified into Type 2A/2B/2C DL CAPs.

The Type 2A DL CAP may be applied to the following transmissions. In theType 2A DL CAP, the BS may perform transmission immediately after thechannel is sensed to be idle at least for a sensing durationT_(short_d1) = 25 us. Here, T_(short_d1) includes the duration Tf(=16us) and one sensing slot duration immediately after the durationT_(f), where the duration T_(f) includes a sensing slot at the beginningthereof.

-   Transmission(s) initiated by the BS including (i) a discovery burst    only or (ii) a discovery burst multiplexed with non-unicast    information, or-   Transmission(s) by the BS after a gap of 25 us from transmission(s)    by the UE within a shared channel occupancy.

The Type 2B DL CAP is applicable to transmission(s) performed by the BSafter a gap of 16 us from transmission(s) by the UE within a sharedchannel occupancy time. In the Type 2B DL CAP, the BS may performtransmission immediately after the channel is sensed to be idle forT_(f)=16 us. T_(f) includes a sensing slot within 9 us from the end ofthe duration. The Type 2C DL CAP is applicable to transmission(s)performed by the BS after a maximum of 16 us from transmission(s) by theUE within the shared channel occupancy time. In the Type 2C DL CAP, theBS does not perform channel sensing before performing transmission.

UL Signal Transmission Method in U-band

The UE may perform a Type 1 or Type 2 CAP for UL signal transmission ina U-band. In general, the UE may perform the CAP (e.g., Type 1 or Type2) configured by the BS for UL signal transmission. For example, a ULgrant scheduling PUSCH transmission (e.g., DCI formats 0_0 and 0_1) mayinclude CAP type indication information for the UE.

Type 1 UL CAP Method

In the Type 1 UL CAP, the length of a time duration spanned by sensingslots sensed to be idle before transmission(s) is random. The Type 1 ULCAP may be applied to the following transmissions.

-   PUSCH / SRS transmission(s) scheduled and/or configured by the BS-   PUCCH transmission(s) scheduled and/or configured by the BS-   Transmission(s) related to a Random Access Procedure (RAP)

FIG. 8 is a flowchart illustrating CAP operations performed by a UE totransmit a UL signal.

Referring to FIG. 8 , the UE may sense whether a channel is idle forsensing slot durations of a defer duration T_(d). Then, if a counter Nis zero, the UE may perform transmission (S1534). In this case, the UEmay adjust the counter N by sensing the channel for additional sensingslot duration(s) according to the following steps:

Step 1) (S1520) The UE sets N to N_(init) (N = N_(init)), where N_(init)is a random number uniformly distributed between 0 and CW_(p). Then,step 4 proceeds.

Step 2) (S1540) If N>0 and the UE determines to decrease the counter,the UE sets N to N-1 (N=N-1).

Step 3) (S1550) The UE senses the channel for the additional sensingslot duration. If the additional sensing slot duration is idle (Y), step4 proceeds. Otherwise (N), step 5 proceeds.

Step 4) (S1530) If N=0 (Y), the UE terminates the CAP (S1532). Otherwise(N), step 2 proceeds.

Step 5) (S1560) The UE senses the channel until either a busy sensingslot is detected within an additional defer duration T_(d) or all theslots of the additional defer duration T_(d) are detected to be idle.

Step 6) (S1570) If the channel is sensed to be idle for all the slotdurations of the additional defer duration T_(d) (Y), step 4 proceeds.Otherwise (N), step 5 proceeds.

Table 9 shows that m_(p), a minimum CW, a maximum CW, an MCOT, and anallowed CW size, which are applied to the CAP, vary depending on channelaccess priority classes.

Table 9 Channel Access Priority Class (P) m_(p) CW _(min,p) CW_(max,p)T_(ulmcot,p) allowed CW_(p) sizes 1 2 3 7 2 ms (3,7) 2 2 7 15 4 ms{7,15} 3 3 15 1023 6 ms or 10 ms {15,31,63,127,255,511,1023} 4 7 15 10236 ms or 10 ms {15,31,63,127,255,511,1023}

The defer duration T_(d) is configured in the following order: durationT_(f) (16 us) + m_(p) consecutive sensing slot durations T_(s1) (9 us).T_(f) includes the sensing slot duration T_(s1) at the beginning of the16-us duration.

The following relationship is satisfied: CW_(min,p) <= CW_(p) <=CW_(max,) _(p). CW_(p) may be initially configured by CW_(p) =CW_(min,p) and updated before step 1 based on an explicit / implicitreception response for a previous UL burst (e.g., PUSCH) (CW sizeupdate). For example, CW_(p) may be initialized to CW_(min,p) based onthe explicit / implicit reception response for the previous UL burst.Alternatively, CW_(p) may be increased to the next highest allowed valueor maintained as it is.

Type 2 UL CAP Method

In the Type 2 UL CAP, the length of a time duration spanned by sensingslots sensed to be idle before transmission(s) may be determined. TheType 2 UL CAP is classified into Type 2A/2B/2C UL CAPs. In the Type 2AUL CAP, the UE may perform transmission immediately after the channel issensed to be idle at least for a sensing duration T_(short_d1) = 25 us.Here, T_(short_d1) includes the duration T_(f) (=16 us) and one sensingslot duration immediately after the duration T_(f). In the Type 2A ULCAP, T_(f) includes a sensing slot at the beginning thereof. In the Type2B UL CAP, the UE may perform transmission immediately after the channelis sensed to be idle for the sensing duration T_(f) =16 us. In the Type2B UL CAP, T_(f) includes a sensing slot within 9 us from the end of theduration. In the Type 2C UL CAP, the UE does not perform channel sensingbefore performing transmission.

RB Interlace

FIG. 9 illustrates an RB interlace. In a shared spectrum, a set ofinconsecutive RBs (at the regular interval) (or a single RB) in thefrequency domain may be defined as a resource unit used/allocated totransmit a UL (physical) channel/signal in consideration of regulationson occupied channel bandwidth (OCB) and power spectral density (PSD).Such a set of inconsecutive RBs is defined as the RB interlace (orinterlace) for convenience.

Referring to FIG. 9 , a plurality of RB interlaces (interlaces) may bedefined in a frequency bandwidth. Here, the frequency bandwidth mayinclude a (wideband) cell/CC/BWP/RB set, and the RB may include a PRB.For example, interlace #m∈{0, 1, ..., M-1} may consist of (common) RBs{m, M+m, 2M+m, 3M+m, ...}, where M represents the number of interlaces.A transmitter (e.g., UE) may use one or more interlaces to transmit asignal/channel. The signal/channel may include a PUCCH or PUSCH.

3. PUCCH Transmission in U-Band

The above descriptions (NR frame structure, RACH, U-band system, etc.)are applicable in combination with methods proposed in the presentdisclosure, which will be described later. Alternatively, thedescriptions may clarify the technical features of the methods proposedin the present disclosure.

In addition, the methods to be described later are related to uplinktransmission and may be equally applied to the uplink signaltransmission method in the above-described U-band system (unlicensedband). It should also be noted that embodiments of the presentdisclosure can be modified or replaced to fit the terms, expressions,structures, etc. defined in each system such that the technical ideaproposed in the present disclosure can be implemented in thecorresponding system.

For example, uplink transmission using methods related to PUCCHtransmission, which will be described later, may be performed in anL-cell and/or a U-cell defined in the U-band system.

As described above, in the Wi-Fi standard (802.11ac), the CCA thresholdis defined as -62 dBm for the non-Wi-Fi signal and -82 dBm for the Wi-Fisignal. In other words, when a station (STA) or an access point (AP) ofthe Wi-Fi system receives a signal from a device not belonging to theWi-Fi system at the power of -62 dBm or more in a specific band, itskips signal transmission in the specific band.

In the present disclosure, the term “unlicensed band” may be replaced orinterchangeably used with “shared spectrum.”

The NR frequency band is defined as two types of frequency ranges, FR1and FR2. FR1 and FR2 may be configured as shown in Table 7 below. FR2may represent a millimeter wave (mmW).

Table 7 Frequency Range designation Corresponding frequency rangeSubcarrier Spacing FR1 410 MHz - 7125 MHz 15, 30, 60 kHz FR2 24250 MHz -52600 MHz 60, 120, 240 kHz

A band (e.g., the 52.6 GHz to 114.25 GHz bands, particularly 71 GHz)higher than the above-mentioned frequency is referred to as FR4. The FR4region may also be used as an unlicensed band.

When a specific device (and/or node) transmits a signal in the sharedspectrum, there may be restrictions in terms of power spectral density(PSD). For example, signal transmission in a partial band of FR4 may berequired to satisfy the PSD of 23 dBm/1 MHz. In addition, signaltransmission in another partial band may be required to satisfy the PSDof 13 dBm/1 MHz. To this end, the UE may increase the allowable power byspreading the signal along the frequency axis.

In addition, as a regulation on the shared spectrum, there may berestrictions in terms of occupied channel bandwidth (OCB). For example,when a specific device transmits a signal, the signal may need to tooccupy 70% of the system bandwidth. When the system bandwidth is 400MHz, the device to transmit a signal may need to occupy 280 MHz or more,which is 70% of 400 MHz.

As the structure of the PUCCH in consideration of regulations related tothe PSD and OCB, the above-described RB interlace structure may be used.

Table 8 shows the total number of PRBs based on the SCS and bandwidth inthe FR2 region.

Table 8 SCS (kHz) 50 MHz 100 MHz 200 MHz 400 MHz N_(RB) N_(RB) N_(RB)N_(RB) 60 66 132 264 N.A 120 32 66 132 264

Table 9 shows the expected total number of PRBs when based on Table 8,when the SCS is 240 kHz, 480 kHz, and 960 kHz, and the bandwidth is 800MHz, 1600 MHz, and 2000 MHz.

Table 9 SCS (kHz) 50 MHz 100 MHz 200 MHz 400 MHz 800 MHz 1600 MHz 2000MHz N_(RB) N_(RB) N_(RB) N_(RB) N_(RB) N_(RB) N_(RB) 60 66 132 264 N.AN.A N.A N.A 120 32 66 132 264 N.A N.A N.A 240 16 32 66 132 264 N.A N.A480 8 16 32 66 132 264 N.A 960 4 8 16 32 66 132 160

Table 10 shows the number of PRBs for deriving the simulation results ofthe present disclosure.

Table 10 SCS (kHz) 50 MHz 100 MHz 200 MHz 400 MHz 800 MHz 1600 MHz 2000MHz N_(RB) N_(RB) N_(RB) N_(RB) N_(RB) N_(RB) N_(RB) 120 32 64 128 256N.A N.A N.A 240 16 32 64 128 256 N.A N.A 480 8 16 32 64 128 256 N.A 9604 8 16 32 64 128 160

When the number of PRBs for each SCS and bandwidth is defined as shownin Table 9 and/or Table 10, it may be difficult to reuse the PUCCHformat of the conventional communication system. Accordingly, in thepresent disclosure, an enhanced PUCCH format for FR4 and content for anenhanced initial PUCCH resource set are proposed.

The number of PRBs for each SCS and bandwidth employed in the system maybe different from those in Table 9 and/or Table 10. The proposed methodsof the present disclosure may be extended and applied to a system basedon the number of PRBs different from those in Table 9 and/or Table 10.

Hereinafter, an operation of a UE for performing PUCCH transmissionproposed in the present disclosure will be described.

(1) First, a UE receives configuration information for PUCCHtransmission from a BS. Here, the configuration information may includeinformation about a PUCCH format and a PUCCH resource for each SCS,which are proposed in the present disclosure. (2) Next, the UEdetermines a resource through which the PUCCH will be transmitted, basedon the configuration information. (3) Next, the UE performs uplinktransmission to the BS on the determined PUCCH resource.

For more details, reference will be made to methods to be describedlater. That is, the methods to be described later may be combined withthe procedures of (1) to (3) to achieve the object/effect proposed inthe present disclosure.

3.1. Enhanced PUCCH Format Design for Above 52.6 GHz

In the FR4 region (e.g., above 52.6 GHz band), not only the PSD and OCBdescribed above, but also the maximum power that one node can transmitis limited. As an example, one node may use up to 40 dBm of power.Therefore, considering the PSD regulation and the maximum power limit,the maximum power that may be transmitted in 1 PRB according to each SCSmay be determined. While the maximum power in each PRB is transmittedaccording to each SCS, the maximum number of PRBs not exceeding themaximum transmission power may be calculated as shown in Tables 11, 12and 13. Table 11 shows a case where the PSD regulation is 23 dBm/1 MHz.Table 12 shows a case where the PSD regulation is 13 dBm/1 MHz.

Table 11 SCS (kHz) 1 PRB BW (MHz) 1 PRB TX power (dBm) # of PRBs TotalTx power (dBm) 120 1.44 24.58 34 39.89 35 40.02 → 40 240 2.88 27.59 1739.89 18 40.14 → 40 480 5.76 30.60 8 39.63 9 40.14 → 40 960 11.52 33.614 39.63 5 40.60 → 40

Table 12 SCS (kHz) 1 PRB BW (MHz) 1 PRB TX power (dBm) # ofPRBs Total Txpower (dBm) 120 1.44 14.58 264 38.80 - - 240 2.88 17.59 174 39.99 17540.02 → 40 480 5.76 20.60 87 39.99 88 40.04 → 40 960 11.52 23.61 4339.95 44 40.04 → 40

Table 13 shows a case where the PSD regulation is 38 dBm/1 MHz and themaximum power limit is 55 dBm per node.

Table 13 SCS (kHz) 1 PRB BW (MHz) 1 PRB TX power (dBm) # of PRBs TotalTx power (dBm) 120 1.44 39.58 34 54.89 35 55.02 → 55 240 2.88 42.59 1754.89 18 55.14 → 55 480 5.76 45.60 8 54.63 9 55.14 → 55 960 11.52 48.614 54.63 5 55.60 → 55

Specifically, in Tables 11 and 13, # of PRBs is obtained identically.The examples in Tables 11 to 13 were derived based on the requirementsin the European region. Even when a different number of PRBs derivedfrom the requirements in other regions is obtained, the proposed methodsof the present disclosure may be used.

As shown in Tables 11 to 13, the minimum number of PRBs per SCS may becalculated, taking into account the PSD requirement and maximum powerlimit. The BS should allocate resources more than the number of PRBscalculated in Tables 11 to 13 to allow the UE to use the maximum powerin transmitting the PUCCH. Therefore, the following methods may beproposed. The number of PRBs proposed below basically means the numberof contiguous PRBs in transmitting PUCCH format 0/1/2/3/4, but may beextended to an interlaced PRB form.

[Method 3-1-1] Setting the Minimum Number of PRBs that Satisfy EffectiveIsotropic Radiated Power (EIRP) for PUCCH Format 0/1

In Method 1, the minimum number of PRBs calculated in consideration ofthe PSD requirement and maximum power limit is set as the minimum numberof PRBs for PUCCH transmission. As an example, the minimum number ofPRBs for each SCS may be given as shown in Table 14 (based on theEuropean Band 75 (c1) requirement).

Table 14 SCS (kHz) Minimum # of PRBs 120 35 240 18 480 9 960 5

As a method to configure and/or set PUCCH format 0 and/or 1 thatsatisfies the PRB numbers in Table 14, the sequence used for PUCCHformat 0 and/or 1 may be configured as a long sequence corresponding tothe minimum number of PRBs calculated in consideration of the PSDrequirement and maximum power limit.

As an example, when the number of PRBs calculated in consideration ofthe PSD requirement and the maximum power limit for each SCS isdetermined as shown in Table 14, a sequence length that may be used forPUCCH formats 0 and/or 1 may be proposed as shown in Table 15. Eachsequence length is determined as the greatest prime number among thenumbers smaller than the number of REs used for uplink transmission.Specifically, in the conventional communication system, a sequence basedon a computer generated sequence (CGS) is used when the sequence lengthis less than or equal to 36, and a Zadoff-Chu (ZC) sequence is used whenthe sequence length is greater than or equal to 36. When the number ofPRBs is determined as shown in Table 14, all sequence lengths aregreater than or equal to 36, and therefore a sequence to be used may bea ZC sequence.

Table 15 SCS (kHz) Minimum # of PRBs # of REs Sequence length (ZC) 12035 420 419 240 18 216 211 480 9 108 107 960 5 60 59

[Method 3-1-1-A] Indicating the Number of PRBs for PUCCH Format 0/1 Bythe BS

In Method 1, the minimum number of PRBs for PUCCH formats 0 and/or 1 iscalculated and predetermined in consideration of the PSD requirement andmaximum power limit. In addition, the BS may indicate the number of PRBsfor transmitting PUCCH format 0/1 to the UE through higher layersignaling (e.g., SIB). In the present disclosure, transmitting a PUCCHformat may mean transmitting the PUCCH for which the correspondingformat is configured.

The BS may efficiently divide the frequency domain resources inconsideration of the SCS value and/or the size of the nominal BW (orcarrier or BWP), and indicate the number of PRBs such that PUCCH formats0 and/or 1 transmitted by a plurality of UEs may be multiplexed.

For example, as shown in Table 16, the number of PRBs for PUCCH formats0 and/or 1 may be allocated in the form of powers of 2, such as 4, 8,16, 32, for each of SCSs 120, 240, 480, and 960 kHz. The BS may indicatethe number of PRBs to the UE through higher layer signaling. When thenumber of PRBs indicated by the BS is smaller than the required numberof PRBs, the UE may transmit PUCCH formats 0 and/or 1 according to thePSD requirement instead of transmitting the maximum power, consideringthe PSD requirement and the maximum power limit.

Table 16 SCS (kHz) Minimum # of PRBs 120 32 240 16 480 8 960 4

When the BS indicates the number of PRBs for PUCCH format 0 and/or 1 inconsideration of FDM capacity, the number of PRBs should be set so asnot to be below a specific range with respect to the number of PRBsdetermined based on PSD requirement and maximum power limit. Anexcessively small number of PRBs may reduce the transmission power ofthe UE, thereby causing a problem in terms of link budget.

[Method 3-1-2] Repeatedly Transmitting the Existing PUCCH Format 0/1 asMany Times as PRBs Corresponding to the Smallest Prime Number that isGreater than or Equal to the Minimum Number of PRBs Satisfying the EIRP

Existing NR PUCCH formats 0 and/or 1 are transmitted as much as a singlePRB. Therefore, as shown in Table 14, when the minimum number of PRBscalculated in consideration of the PSD requirement and the maximum powerlimit is defined, the corresponding single PRB may be repeated in thefrequency domain. In the present disclosure, repetition of a PRB may beinterpreted as repetition of a PUCCH sequence included in the PRB. Thenumber of repeated PRBs may be determined as the smallest prime numberamong the numbers greater than or equal to the defined minimum number ofPRBs. Existing NR PUCCH formats 0 and/or 1 may be transmitted based onthe determined number of repeated PRBs. The number of repeated PRBsselected in Table 14 is shown in Table 17.

Table 17 SCS (kHz) Minimum # of PRBs Prime number 120 35 37 240 18 19480 9 11 960 5 5

Since the repeated sequence may deteriorate the peak-to-average powerratio (PAPR)/cubic metric (CM) performance, a phase shift pattern havingπ/4 step may be applied to achieve low PAPR/CM performance. As anexample, in the case of 480 kHz SCS, when NR-PUCCH formats 0 and/or 1are repeatedly transmitted by 11 PRBs in the frequency domain, one ofthe top four phase shift patterns in FIG. 10 may be used. In this case,the reason for using one of the top four phase shift patterns is thatthe phase shift pattern used has superior PAPR/CM performance than theother phase shift patterns. Here, the phase shift may occur by {0, π/4,2π/4, 3π/4} in order of {1, 0+1i, -1, 0-1i}, and each pattern may beapplied and/or configured in a PRB level. For example, when theuppermost pattern among the patterns of FIG. 10 is used, sequences ofthe first to third PRBs (in ascending or descending order in thefrequency domain) among the 11 PRBs are not phase shifted, and thesequences of the fourth to sixth PRBs are phase shifted by 2π/4.

When a phase shift pattern having a step of π/4 is applied, the numberof PRBs is suggested as a prime number for the reason shown in FIG. 11 .It may be seen from FIG. 10 that better PAPR/CM performance is obtainedwhen the number of sequences repeatedly transmitted in the PRB level isset to a prime number than when the number is set to a number that isnot a prime number.

[Method 3-1-3] Defining the Minimum Number of PRBs for PUCCHTransmission for PUCCH Format ⅔

PUCCH formats 2 and 3 are formats in which PUCCH transmission throughmultiple PRBs is supported. Accordingly, compared to the conventionalcommunication system, the BS may configure and/or indicate transmissionof PUCCH formats 2 and/or 3 using more than the minimum PRB calculatedin consideration of the PSD requirement and the maximum power limitwithout additional definition.

In the case of PUCCH formats 2 and/or 3, even if the BS indicates aPUCCH resource, the UE may not fully use the indicated PUCCH resource.Specifically, the UE may perform transmission transmit by reducing thenumber of PRBs in accordance with the coding rate for transmission ofPUCCH format 2 and/or 3 within the PUCCH resource indicated by the BS.

In the FR4 band, reliability may be secured only when the PUCCH istransmitted using at least the minimum number of PRBs calculated inconsideration of the PSD requirement and the maximum power limit asmentioned above. When the UE is to transmit PUCCH format 2 and/or 3 byreducing the number of PRBs for PUCCH format 2 and/or 3 according to thecoding rate, the number of PRBs may be configured not to be smaller thanthe minimum number of PRBs calculated in consideration of the PSDrequirement and maximum power limit. For example, when the minimumnumber of PRBs is defined as shown in Table 14, the UE may reduce thenumber of PRBs based on the coding rate up to the minimum number of PRBslisted in Table 14.

Additionally, the minimum number of PRBs calculated in consideration ofthe PSD requirement and maximum power limit may depend on regionalregulations and the like. In consideration of this feature, the BS mayindicate the minimum number of PRBs through higher layer signaling(e.g., SIB or (dedicated) RRC signaling). When the UE is to performtransmission by reducing the number of PRBs for PUCCH formats 2 and/or 3according to the coding rate, the number of PRBs may not be reducedbelow the minimum number of PRBs indicated by the BS. In this case, itmay be preferable in terms of reliability of the UE to set the number ofPRBs that the BS may indicate to be greater than or equal to the minimumnumber of PRBs calculated in consideration of the PSD requirement andthe maximum power limit.

In addition, the maximum number of PRBs that may be allocated to NRPUCCH formats 2 and/or 3 needs to be redefined. Currently, the minimumnumber of PRBs that may be allocated to NR PUCCH formats 2 and 3 isdefined as 16. However, when the minimum number of PRBs as shown inTable 14 is defined as an example, the maximum number of RBs that may beallocated to PUCCH formats 2 and/or 3 needs to be set to be greater thanor equal to the minimum number of PRBs. The maximum number of PRBs mayalso depend on regional regulations. In consideration of this feature,the BS may indicate the maximum number of PRBs through higher layersignaling (e.g., SIB or (dedicated) RRC signaling). The BS may indicateto the UE the maximum number of PRBs, and may also indicate to the UEthe number of PRBs less than or equal to the maximum number of PRBs. TheUE may use the acquired number of PRBs for transmission of PUCCH format2 and/or 3.

[Method 3-1-4] Setting the Number of PRBs for PUCCH Format 4 andIncreasing the (Maximum) OCC Length Ofpre-DFT OCC as the Number of PRBsIncreases

NR PUCCH format 4 is a PUCCH format capable of UE multiplexing withpre-DFT OCC while using a single PRB. In this regard, the DFT operationis used, and therefore the number of PRBs for PUCCH format 4 shouldalways be set to satisfy a multiple of 2, 3 or 5 (i.e., DFT constraint:a number that may be expressed in the form of 2^(a)*3^(b)*5^(c), wherea, b, and c are positive integer including 0). Therefore, given theminimum PRB value calculated in consideration of the PSD requirement andthe maximum power limit in the FR4 region, the number of PRBs for PUCCHformat 4 may be set to one of the following options, further consideringeven the DFT constraint.

(Option 3-1-4-1) Minimum Number of PRBs that Satisfy the DFT Constraintwhile Achieving the Maximum TX Power

To set the number as in Option 3-1-4-1, the number of PRBs should be setto a value greater than or equal to the minimum number of PRBscalculated in consideration of the PSD requirement and the maximum powerlimit. Therefore, the smallest number of PRBs may be selected from amongthe numbers of PRBs that are greater than or equal to the minimum numberof PRBs and satisfy the DFT constraint.

For example, when the minimum number of PRBs is defined as shown inTable 14, the minimum number of PRBs that is greater than or equal tothe defined minimum number of PRBs and satisfy the DFT constraint isshown in Table 18.

Table 18 SCS (kHz) Minimum # of PRBs With DFT constraint 120 35 36 =2²*3²*5⁰ 240 18 18 = 2¹×3²×5⁰ 480 9 9 = 2⁰×3²×5⁰ 960 5 5 = 2⁰×3⁰×5¹

(Option 3-1-4-2) Maximum Number of PRBs that Satisfy the DFT ConstraintWhile Approaching the Maximum TX Power

To set a number as in option 3-1-4-2, the largest number may be selectedfrom among the numbers of PRBs that are less than or equal to theminimum number of PRBs calculated in consideration of the PSDrequirement and the maximum power limit and satisfy the DFT constraint.

For example, when the minimum number of PRBs is defined as shown inTable 14, the maximum number of PRBs that are less than or equal to thedefined minimum number of PRBs and satisfy the DFT constraint may berepresented as shown in Table 19.

Table 19 SCS (kHz) Minimum # of PRBs With DFT constraint 120 35 32 =2⁵*3⁰*5⁰ 240 18 18 = 2¹*3²*5⁰ 480 9 9 = 2⁰*3²*5⁰ 960 5 5 = 2⁰*3⁰*5¹

According to option 3-1-4-2, the number of PRBs required is reduced(e.g., in the case of 120 kHz) compared to option 3-1-4-1. Accordingly,option 3-1-4-2 is advantageous in terms of frequency multiplexing withother signals and/or channels. However, in option 3-1-4-2, when the UEtransmits PUCCH format 4, the maximum transmit power may not be achieved(e.g., in the case of 120 kHz). Accordingly, option 3-1-4-1 may beadvantageous in terms of reliability.

Next, since the number of PRBs is increased in the FR4 region, thelength of the pre-DFT OCC may be increased. When the pre-DFT OCC isincreased, the UE multiplexing capacity may be increased. The pre-DFTOCC length of PUCCH format 4 in the current NR is length=2 when amaximum of two UEs are multiplexed, and length=4 when a maximum of fourUEs are multiplexed.

When the number of PRBs is defined as shown in Table 18 or Table 19, ifthe number of REs corresponding to the number of PRBs is divided by apower of 2, the power of 2 may be the OCC length and the maximum numberof multiplexed UEs. As an example, in the case of 120 kHz SCS of Table18, there are 36 * 12 = 432 REs for a resource for PUCCH format 4. Also,since 432 = 16 * 27, a maximum of 16 UEs may be multiplexed. In thiscase, the OCC length may be 16. When the actual pre-DFT is performed,length-16 OCC may be applied to in a bundle of 27 RE, and thus a totalsequence of length 432 may be configured. Thereby, 4 times the UEmultiplexing capacity in the existing NR PUCCH format 4 may be secured.

If increasing the multiplexing capacity is a major issue, as shown inTable 20, the largest number of the PRBs among the powers of 2 that isless than or equal to the minimum number of PRBs satisfying the PSDrequirement and the maximum power limit may be determined as the numberof PRBs for PUCCH format 4 (satisfying the DFT constraint as a power of2).

Table 20 SCS (kHz) Minimum # of PRBs Power of 2 120 35 32 = 2⁵×3⁰×5⁰ 24018 16 = 2⁴x3⁰x5⁰ 480 9 8 = 2³x3⁰x5⁰ 960 5 4 = 2²x3⁰x5⁰

When configuration is established as shown in Table 20, multiplexing of16 UEs (pre-DFT OCC length = 16) may be supported in all SCSs. In the120 kHz SCS, multiplexing of up to 128 UEs (pre-DFT OCC length = 128)may be supported.

PRB Configurability of Enhanced PUCCH Format

As mentioned above, multiple PRBs, not one PRB, may be defined as beingused for transmission of PUCCH format 0/1/4 and the like for FR4.Specifically, the multiple PRBs may be defined in the form of PRBs foractual transmission, or a PRB range or minimum PRBs in which thattransmission may be actually perfomed. Specifically, they may beconfigured/indicated using one of the following methods and/or acombination thereof.

1. Number of PRBs for enhanced PUCCH format (e.g., EPF 0/1/4)

A. A fixed number of PRBs for enhanced PUCCH formats (EPFs) may bepredefined between the BS and the UE.

A-i. The number of PRBs may be set/indicated as an optimal value inconsideration of TX power, independently for each SCS, and as a fixedvalue.

B. The maximum value of PRBs for EPFs may be predefined between the BSand the UE.

B-i. The BS may set/indicate an appropriate number of PRBs among thevalues from 1 to the maximum number of PRBs defined above inconsideration of the SCS of the PUCCH and the TX power of the UE.

C. The minimum value of PRBs for EPFs may be predefined between the BSand the UE.

C-i. The BS may set/indicate an appropriate number of PRBs inconsideration of the SCS of the PUCCH and the TX power of the UE suchthat the appropriate number is greater than or equal to the minimum PRBdefined above.

D. The minimum and maximum PRB values for EPFs may be predefined betweenthe BS and the UE.

D-i. The BS may set/indicate an appropriate number of PRBs inconsideration of the SCS of the PUCCH and the TX power of the UE suchthat the appropriate number is greater than or equal to the minimum PRBdefined above and less than or equal to the maximum PRB.

2. The actual number of PRBs to be used in the above-mentioned methodmay follow the methods proposed in Section 3.1 above.

3. Methods that may configure the number of PRBs among theaforementioned methods

3-A. The BS may indicate the number to the UE at the PRB level.

3-B. The number may be allocated differently for each PUCCH resource.

Setting the Starting Cyclic Shift Value When a Single ZC Sequence isUsed for PUCCH Format 0/1

Among the above methods, when a single ZC sequence is configured forPUCCH format 0 and/or 1, a starting cyclic shift value defined usinglength-12 CGS needs to be changed. In the conventional system, as shownin Tables 21 to 24 below, a cyclic shift (CS) value for indicatingHARQ-ACK and/or positive/negative SR of PF0 when using the length-12 CGSis defined. Table 21 shows mapping of values for one HARQ-ACKinformation bit to sequences for PUCCH format 0. Table 22 shows mappingof values for two HARQ-ACK information bits to sequences for PUCCHformat 0. Table 23 shows mapping of values for one HARQ-ACK informationbit and positive SR to sequences for PUCCH format 0. Table 24 showsmapping of values for two HARQ-ACK information bits and positive SR tosequences for PUCCH format 0.

That is, the UE transmits 1-bit HARQ-ACK information and/orpositive/negative SR information using CS {0, 6} and CS {3, 9}, andtransmits 2-bits HARQ-ACK information and/or positive/negative SRinformation using CS {0, 3, 6, 9} and CS {1, 4, 7, 10}. In addition,when the UE transmits 1-bit HARQ-ACK and/or positive/negative SRinformation, CS {1, 7} & CS {4, 10}, and CS {2, 8} & CS {5, 11} may beused for UE multiplexing.

Table 21 HARQ-ACK Value 0 1 Sequence cyclic shift m_(cs)=0 m_(cs)=6

Table 22 HARQ-ACK Value {0, 0} {0,1} {1,1} {1,0} Sequence cyclic shiftm_(cs)=0 m_(cs)=3 m_(cs)=6 m_(cs)=9

Table 23 HARQ-ACK Value 0 1 Sequence cyclic shift m_(cs)=3 m_(cs)=9

Table 24 HARQ-ACK Value {0, 0} {0,1} {1,1} {1,0} Sequence cyclic shiftm_(cs) =1 m_(cs) = 4 m_(cs) = 7 m_(cs) = 10

Additionally, in the case of PF1, CS {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,11} is used for UE multiplexing.

Accordingly, when a ZC sequence length is newly defined in place of thelength-12 CGS, a CS value to replace the existing CS value is required.First, the CS value may be determined based on the total number of REsto be occupied by a ZC sequence length to be newly introduced. Second,the CS value may be determined based on the ZC sequence length to benewly introduced.

1. Determining CS values based on the total number of REs to be occupiedby the ZC sequence to be newly introduced

1-A. the total number of REs to be occupied by the ZC sequence length tobe newly introduced is defined as K, the interval between the actual CSsmay be K/12.

1-A-i. The portion occupied by the normal CP length in the current {OFDMsymbol length + normal CP length} is about 1/12. Accordingly, when thelength-12 CGS is used, the interval of the actual CS is set to 12/12 =1.

1-A-ii. The CS values of {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11} may bereplaced with {0, K/12, 2^(∗)K/12, 3^(∗)K/12,..., 11^(∗) K/12}.

1-B. For example, when K is 420 REs (the actual ZC sequence is L419-ZC),420/12 = 35 may be an interval that the CS has.

1-B-i. CSs {0, 6}, {1, 7}, {2, 8}, {3, 9}, {4, 10}, {5, 11}, {0, 3, 6, 9}, and {1, 4, 7, 10} used in NR PF0 may be replaced with CSs {0, 210},{35, 245}, {70, 280}, {105, 315}, {140, 350}, {175, 385}, {0, 105, 210,315}, and {35, 140, 245, 350} for EPF0 of FR4.

1-B-ii. CS {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11} used in NR PF1 may bereplaced with CS {0, 35, 70, 105, 140, 175, 210, 245, 280, 315, 350,385} for EPF1 in FR4.

1-C. As another example, when K is 216 REs (the actual ZC sequence isL211-ZC), 216/12 = 18 may be an interval that the CS has.

1-C-i. CSs {0, 6}, {1, 7}, {2, 8}, {3, 9}, {4, 10}, {5, 11}, {0, 3, 6, 9}, and {1, 4, 7, 10} used in NR PF0 may be replaced with CSs {0, 108},{18, 126}, {36, 144}, {54, 162}, {72, 180}, {90, 198}, {0, 54, 108,162}, and {18, 72, 126, 180} for EPF0 of FR4.

1-C-ii. CS {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11} used in NR PF1 may bereplaced with CS {0, 18, 36, 54, 72, 90, 108, 126, 144, 162, 180, 198}for EPF1 in FR4.

2. Determining CS values based on the length of the ZC sequence to benewly introduced

2-A. When the length of the ZC sequence to be newly introduced isdefined as L, the interval that the actual SC has may be [L/12] or[L/12] . The floor function or the ceiling function is used because theZC sequence is always a prime number, and thus the value obtained bydividing the same by 12 is not an integer.

2-A-i. The portion occupied by the normal CP length in the current {OFDMsymbol length + normal CP length} is about ⅟12. Accordingly, when thelength-12 CGS is used, the interval of the actual CS is set to 12/12 =1.

2-A-ii. The CS values of {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11} may bereplaced with {0, [L/12] , 2∗ [L/12] , 3∗ [L/12] ,..., 11∗ [L/12]} or{0, [L/12] , 2∗ [L/12] , 3∗ [L/12] ,..., 11∗[L/12] }. Alternatively, theCS values of {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11} may be replaced with{0, [L/12] , [2xL/12] , [3xL/12] ,..., [11xL/12] } or {0, [L,12] ,[2xL/12] , [3xL/12] ,..., [11xL/12] }.

2-A-iii. Alternatively, [L/12] or [L/12] may be alternately applied.

B. As an example, when L is 419 (the number of actually mapped REs is420), [419/12] = 35 or [419/12] = 34 may be the interval that the CShas.

B-i. When the CS interval is 35, the aforementioned method in item 1-Bmay be used.

B-ii. When the CS interval is 34, CSs {0, 6}, {1, 7}, {2, 8}, {3, 9},{4, 10}, {5, 11}, {0, 3, 6, 9}, and {1, 4, 7, 10} used in NR PF0 may bereplaced with CSs {0, 204}, {34, 238}, {68, 272}, {102, 306}, {136,340}, {170, 374}, {0, 102, 204, 306}, and {34, 136, 238, 340} for EPF0of FR4.

B-iii. When the CS interval is 34, CS { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11} used in NR PF1 may be replaced with CS {0, 34, 68, 102, 136,170, 204, 238, 272, 306, 340, 374} for EPF1 of FR4.

C. As another example, when L is 211 (the number of actually mapped REsis 216), [211/12] = 18 or [211/12] = 17 may be the interval that the CShas.

C-i. When the CS interval is 18, the method in item 1-C may be used.

C-ii. When the CS interval is 17, CSs {0, 6}, {1, 7}, {2, 8}, {3, 9},{4, 10}, {5, 11}, {0, 3, 6, 9}, and {1, 4, 7, 10} used in NR PF0 may bereplaced with CSs {0, 102}, {17, 119}, {34, 136}, {51, 153}, {68, 170},{85, 187}, {0, 51, 102, 153}, and {17, 68, 119, 170} for EPF0 of FR4.

C-iii. Similarly, when the CS interval is 17, CS {0, 1, 2, 3, 4, 5, 6,7, 8, 9, 10, 11} used in NR PF1 may be replaced with CS {0, 17, 34, 51,68, 85, 102, 119, 136, 153, 170, 187} for EPF1 in FR4.

3.2. Enhanced Initial PUCCH Resource Set Design for Above 52.6 GHz

FIG. 12 illustrates a configuration for an initial PUCCH resource set.

In FIG. 12 , when the “set of initial CS indexes” has two elements(indexes 0, 3, 7, 11), 8 PRBs are required for PUCCH transmissionbecause PUCCH format 0 and/or 1 is subjected to a single PRBtransmission (i.e., one PRB is one FDM resource). Similarly, when the“set of initial CS indexes” has three elements (indexes 1 and 2), 6 PRBsare required for PUCCH transmission. When the “set of initial CSindexes” has four elements (indexes 4, 5, 6, 8, 9, 10, 12, 13, 14, and15), 4 PRBs are required for PUCCH transmission.

In FR4, as mentioned in Section 3.1 above, the minimum PRB values shownin Table 14 may be defined in consideration of the PSD requirement andthe maximum power limit. In order for the defined PRB values to beapplied to the initial PUCCH resource set, the number of PRBscorresponding to one FDM resource may be set to the minimum of PRBsshown in Table 14. As mentioned above, when the “set of initial CSindexes” has two elements (indexes 0, 3, 7, and 11) in FIG. 12 , 8 FDMresources are required. Configurability of the 8 FDM resources is shownin Table 25 according to each SCS value and/or nominal BW (Carrier/BWPBW) size. Table 25 is based on assumption that Table 14 is determined asthe minimum number of PRBs.

Table 25 Nominal BW (Carrier/BWP BW) (MHz) SCS (kHz) # ofPRBs x8 200 400800 1600 2000 120 35 280 X X NA NA NA (>132) (>264) 240 18 144 X (>66) X(>132) O (<264) NA NA 480 9 72 X (>32) X (>66) O (<132) O (<264) NA 9605 40 X (>16) X (>32) O (<66) O (<132) O (<160)

Referring to Table 25, when the size of the nominal BW (Carrier/BWP BW)is 200 MHz or 400 MHz, 8 FDM resources may not be secured for all SCSvalues.

As mentioned above, when the “set of initial CS indexes” has threeelements (indexes 1 and 2) in FIG. 12 , 6 FDM resources are required.Table 25 shows the SCS values and/or the size of the nominal BW(Carrier/BWP BW). Table 26 is based on the assumption that Table 14 isdetermined as the minimum number of PRBs.

Table 26 Nominal BW (Carrier/BWP BW) SCS (kHz) # ofPRBs X6 200 400 8001600 2000 120 35 210 X (>132) O (<264) NA NA NA 240 18 108 X (>66) O(<132) O (<264) NA NA 480 9 54 X (>32) O (<66) O (<132) O (<264) NA 9605 30 X (>16) O (<32) O (<66) O (<132) O (< 160)

Referring to Table 26, when the size of the nominal BW (Carrier/BWP BW)is 200 MHz, 6 FDM resources may not be secured for all SCS values.

It may be seen that if the initial PUCCH resource set of the existing NRis used in FR4, FDM resources may not be secured. Accordingly, inSection 3.2, methods for configuring an initial PUCCH resource set inFR4 are proposed.

When initial PUCCH formats 0 and/or 1 are transmitted in the form ofmultiple PRBs in Section 3.2, the methods (e.g., Method 1 and/or Method2) proposed in Section 3.1 may be combined.

[Method 3-2-1] Configuring Non-Overlapping PUCCH Resources in theFrequency Domain to be Valid, Starting with the Lowest PUCCH Resource

The first row of FIG. 13 shows initial CS index values, When the PUCCHresource set with index 0 in FIG. 12 is configured, CS index values maybe 0 and 3 as shown in FIG. 13 . When a PUCCH resource set of anotherindex in FIG. 12 is configured, a different initial CS index value maybe given. The remaining part of FIG. 13 shows values of 16 PUCCHresources (r_(PUCCH)) included in one PUCCH resource set. The 16resources r_(PUCCH) may be arranged as shown in FIG. 13 .

Referring to FIG. 13 , when 8 FDM resources are required (namely, whenthe “set of initial CS indexes” has two elements), PUCCH resources 0 to7 are configured starting with a lower frequency PRB, and PUCCHresources 8 to 15 are configured starting with a higher frequency PRB,within the initial UL BWP. When frequency hopping is configured, PUCCHresources 0 to 7 are configured starting with a higher frequency PRB,and PUCCH resources 8 to 15 are configured starting with a lowerfrequency PRB, within the initial UL BWP.

Method 1 is to configure only non-overlapping PUCCH resources in thefrequency domain to be valid, starting with the lowest PUCCH resource.As an example, based on Table 25, when 120 kHz SCS is used and the 200MHz nominal BW (Carrier/BWP BW) is applied, the maximum possible numberof FDM resources is up to three sets of 35 PRBs (132/35 = 3.77).Therefore, when the “set of initial CS indexes” of FIG. 12 has twoelements (indexes 0, 3, 7, 11 in FIG. 12 ), up to 6 PUCCH resources arevalid in one PUCCH resource set, considering that there are three setsof PRBs in the frequency domain, and two CS values are available.Accordingly, in one PUCCH resource set, a total of six PUCCH resourceswith r_(PUCCH) ranging from 0 to 5 may be configured as valid PUCCHresources.

As another example, based on Table 25, when 120 kHz SCS is used and the400 MHz nominal BW (Carrier/BWP BW) is applied, the maximum possiblenumber of FDM resources is up to 7 sets of 35 PRBs (264/35 = 7.54).Therefore, when the “set of initial CS indexes” of FIG. 12 has twoelements (indexes 0, 3, 7, 11 in FIG. 12 ), a total of 14 PUCCHresources with r_(PUCCH) ranging from 0 to 13 in one PUCCH resource setmay be configured as valid PUCCH resources.

The BS and the UE pre-recognize this configuration, and the BS indicatesPUCCH resources to allow the UE to select a valid PUCCH resourceaccording to the SCS and the size of the nominal BW (Carrier/BWP BW).The UE does not expect an invalid PUCCH resource to be indicated by theBS.

[Method 3-2-1-A] Configuring Non-Overlapping PUCCH Resources in theFrequency Domain to be Valid, Starting with the Lowest PUCCH Resource,and Indicating, by the BS, the Number of PRBs for Initial PUCCHTransmission

Method 1 is to calculate and pre-determine the minimum number of PRBsfor PUCCH formats 0 and/or 1 in consideration of the PSD requirement andmaximum power limit, and select a valid PUCCH resource in the initialPUCCH resource set accordingly. In addition, the BS may indicate to theUE the minimum number of PRBs for transmission of PUCCH formats 0 and/or1 through higher layer signaling (e.g., system information block (SIB)).

The BS may indicate the minimum number of PRBs for transmission of PUCCHformats 0 and/or 1 in consideration of the SCS value and/or the size ofthe nominal BW (Carrier/BWP BW). As mentioned above, the minimum numberof PRBs may be indicated such that a maximum of 8 FDM resources may besecured.

If 8 resources capable of FDM are not secured as a result of calculatingthe minimum number of PRBs indicated by the BS basedc on the SCS valueand/or the size of the nominal BW (Carrier/BWP BW) for PUCCH format 0and/or 1, the UE may transmit PUCCH formats 0 and/or 1, determining thatthe resources are valid starting with the lowest PUCCH resource asmentioned in method 1. The UE may not expect an invalid PUCCH resourceto be indicated by the BS.

Alternatively, according to the index value of FIG. 12 (or according tothe number of elements in the “set of initial CS indexes”), the minimumnumber of PRBs for PUCCH formats 0 and/or 1 may be individually set. Forexample, in the case of indexes 0, 3, 7, and 11, the BS set a minimumnumber of PRBs for PUCCH formats 0 and/or 1 to be small, such that amaximum of 8 FDM resources may be generated. In the case of indexes 1and 2, the BS sets the minimum number of PRBs for PUCCH formats 0 and/or1 to a value greater than the minimum number of PRBs for indexes 0, 3,7, and 11, such that a maximum of 6 FDM resources may be generated.

As an example, based on Table 25, when 120 kHz SCS is used and the 200MHz nominal BW (Carrier/BWP BW) is applied, the minimum number of PRBsmay be set to 16 for indexes 0, 3, 7, and 11 in FIG. 12 ,. In this case,the maximum possible number of FDM resources becomes 132/16=8.25, andthus PUCCH resources 0 to 15 may all be valid resources. For indexes 1and 2 in FIG. 12 , the minimum number of PRBs may be set to 22. In thiscase, the maximum possible number of FDM resources becomes 132/22=6, andthus PUCCH resources 0 to 15 may all be valid resources. Finally, forindexes 4, 5, 6, 8, 9, 10, 12, 13, 14, and 15 in FIG. 12 , the minimumnumber of PRBs may be set to 33. In this case, the maximum possiblenumber of FDM resources becomes 132/33=4, and thus PUCCH resources 0 to15 may all be valid resources.

As another example, based on Table 25, when 120 kHz SCS is used and the400 MHz nominal BW (Carrier/BWP BW) is applied, the minimum number ofPRBs may be set to 33 for index 0, 3, 7, 11 in FIG. 12 . In this case,the maximum possible number of FDM resources becomes 264/33 = 8, andthus PUCCH resources 0 to 15 may all be valid resources. For theremaining indexes in FIG. 12 , the minimum number of PRBs may be set to35, and a maximum of 6 or 4 FDM resources may be secured.

[Method 3-2-2] Configuring Non-Overlapping PUCCH Resources in theFrequency Domain to be Valid, Starting with the Lowest PUCCH Resource,and Additionally Indicating TDM/CDM Resources for Insufficient PUCCHResources

In NR-U, when PUCCH formats 0 and/or 1 are transmitted in an interlacedPRB structure, TDM or CDM resources are additionally indicated. As anexample, a method of adding one more starting symbol index and a methodof adding one more OCC index are supported.

Similarly, in the FR4 band, the minimum number of PRBs for PUCCH formats0 and/or 1 may be pre-calculated and determined in consideration of PSDrequirement and maximum power limit as in Method 1. Based on thedetermined minimum number of PRBs, PUCCH resources configured to bevalid may be first used, and the remaining PUCCH resources may beconfigured by adding a starting symbol index and/or OCC index (until atotal of 16 PUCCH resources are created for each index).

Additionally, the BS be configured to indicate the minimum number ofPRBs. Under the assumption candidate values that may be indicated by theBS are preconfigured and the UE and the BS pre-recognize the same, aPUCCH resource with which application of the starting symbol index orOCC index starts may be defined based on the SCS value and/or thenominal BW (Carrier/BWP BW) value, etc.

The methods proposed above may include a method for generating a CSvalue that may replace the CS value to be used for indication ofHARQ-ACK and/or positive/negative SR when a new ZC sequence length isdefined for enhancement of PUCCH formats 0 and/or 1. This method mayalso be applied to the initial PUCCH resource set.

As an example, when the method of determining CS values based on thetotal number of REs occupied by a ZC sequence to be newly introduced isapplied among the above-mentioned methods, the applicable CS values maybe {0, 35, 70, 105, 140, 175, 210, 245, 280, 315, 350, 385} when it isassumed that the length-419 ZC sequence occupying 420 REs is used forPUCCH format 0 and/or 1 (i.e., when SCS is 120 kHz), Therefore, the CSvalues should also be reflected in the table (FIG. 12 ) for determiningthe initial PUCCH resource. That is, in FIG. 12 , {0, 3} may be replacedwith {0, 105}, {0, 4, 8} may be replaced with {0, 140, 280}, {0, 6} maybe replaced with {0, 210}, and {0, 3, 6, 9} may be replaced with {0,105, 210, 315}, respectively. FIG. 14 shows the result of thereplacement.

As another example, when the method of determining CS values based onthe length of a ZC sequence to be newly introduced is applied among theaforementioned methods, ^([211/12]) = 17 may be used as a differencebetween applicable CS values when it is assumed that the length-211 ZCsequence occupying 216 REs is used for PUCCH format 0 and/or 1 (i.e.,the SCS is 240 kHz). That is, {0, 17, 34, 51, 68, 85, 102, 119, 136,153, 170, 187} may be used as the applicable CS values. Therefore, theCS values should also be reflected in the table (FIG. 12 ) fordetermining the initial PUCCH resource. That is, in FIG. 12 , {0, 3} maybe replaced with {0, 51}, {0, 4, 8} may be replaced with {0, 68, 136},{0, 6} may be replaced with {0, 102}, and {0, 3, 6, 9} may be replacedwith {0, 51, 102, 153}, respectively. FIG. 15 shows the result of thereplacement.

While FIGS. 14 and 15 illustrate the examples based on the same sequencelength (i.e., the same SCS for PUCCH), the examples of FIGS. 14 and 15may be modified and/or configured to use an independent sequence lengthfor each index (that is, an independent SCS for PUCCH). In this case,the CS value for each index may be replaced with a CS value suitable forthe sequence length.

3.3. Sequence Repetition for Enhanced PUCCH Format 0/1 for Above 52.6GHz

When PUCCH format 0/1 is indicated in an interlaced structure in NR-U,m_(int)=5^(∗) ^(nµ IRB) is defined as a CS value to be applied to PRBsconstituting each interlace in addition to the starting CS (cyclicshift) value defined in the existing NR, such that different CS valuesmay be used in respective PRBs (that is, the CS value is set to increaseby 5 for each PRB) (TS38.211). This has been introduced to enhancePAPR/CM performance.

In FR4, contiguous mapping is considered instead of interlace structureunlike in NR-U. To this end, a method of sequence repetition withdifferent CS values may be considered, and thus the following methodsare proposed.

[Method 3-3-1] A method for Setting the Starting CS Value When CGS ofOther Lengths Than the Length-12 CGS is Used

In the existing NR, PUCCH formats 0 and/or 1 use a length-12 CGS(computer generated sequence). In NR-U, the PRB level interlacestructure is considered, and accordingly the length-12 CGS is repeatedlytransmitted in the interlace structure.

In FR4, contiguous mapping is considered instead of the interlacestructure. In addition, PUCCH format 0/1 capable of occupying multiplePRBs due to the PDS requirement and maximum power limit is beingconsidered. Accordingly, repeated transmission in the frequency domainusing the CGS of other lengths (e.g., Length-6 CGS, Length-18 CGS,Length-24 CGS) than the length-12 CGS may be considered. In order toenhance PAPR/CM performance, it is necessary to define a delta valuethat allows different CS values to be used for respective repetitions.That is, as in m_(int)=5 ^(nµ IRB) of FIG. 16 , when delta is 5 in thelength-12 CGS, 5 may be reused as delta when the length-2 CGS isrepeatedly transmitted and contiguous mapping is performed. When the CGSof another length is repeatedly transmitted and subjected to contiguousmapping, a similar delta value needs to be defined.

As the value of delta, a value that is coprime to the sequence lengthmay be selected. Among the coprime values, a value exhibiting the bestPAPR/CM performance improvement may be selected as delta.

As an example, for the length-6 CGS, when {1, 5}, which are coprime to6, and {2, 3}, which is a control group, are used as delta, the CS valueand PAPR/CM performance for each repetition may be obtained as shown inTable 27. Here, the CS value for each repetition means a CS value in then-th sequence when the length-6 CGS is repeated N times (where n=1, 2,3,..., N). In this case, the CS value in the n-th repeated sequence maybe obtained as ((n-1)*delta) mod (sequence length). For example, whendelta is 5, the CS value in the sixth repeated sequence is (6-1)*5 mod 6= 1.

As a result, performance is found good when 1 and 5, which are coprimeto sequence length 6, are selected as delta, and performance is foundbetter when 1 is selected as delta than when 5 is selected. Therefore,when the length-6 CGS is repeatedly transmitted, the CS value 1 or 5 maybe used. Specifically, 1 may be used.

Table 27 Delta CS value for each repetition PAPR (dB) CM (dB) 1 {0, 1,2, 3, 4, 5} 3.198345 1.566 2 {0, 2, 4, 0, 2, 4} 5.560008 4.579 3 {0, 3,0, 3, 0, 3} 6.571037 7.026 5 {0, 5, 4, 3, 2, 1} 3.21909 1.742

As another example, for the length-18 CGS, when {1, 5, 7, 11, 13, 17},which are coprime to 18, and {2, 3}, which is a control group, are usedas delta, the CS value and PAPR/CM performance for each repetition maybe obtained as shown in Table 28. Here, the CS value for each repetitionmeans a CS value in the n-th sequence when the length-18 CGS is repeatedN times (where n=1, 2, 3,..., N). In this case, the CS value in the n-threpeated sequence may be obtained as ((n-1)*delta) mod (sequencelength). For example, when delta is 5, the CS value in the sixthrepeated sequence is (6-1)*5 mod 18 = 7.

As a result, performance is found good when {1, 5, 7, 11, 13, 17}, whichare coprime to sequence length 18, are selected as delta, andperformance is found better when 13 is selected as delta than when theother values are selected. Therefore, when the length-18 CGS isrepeatedly transmitted, one of the CS values {1, 5, 7, 11, 13, 17} maybe used. Specifically, 13 may be used.

Table 28 Delta CS value for each repetition PAPR (dB) CM (dB) 1 {0, 1,2, 3, 4, 5, 6, 7, 8, 9, 10, 11 12, 13, 14, 15, 16, 17} 3.229425 1.38 2{0, 2, 4, 6, 8, 12, 14, 16, 0, 2, 4, 6, 8, 12, 14, 16} 5.51267 4.224 3{0, 3, 6, 9, 12, 15, 0, 3, 6, 9, 12, 15, 0, 3, 6, 9, 12, 15} 6.6777976.709 5 {0, 5, 10, 15, 2, 7, 12, 17, 4, 9, 14, 1, 6, 11, 16, 3, 8, 13 }3.299061 1.25 7 {0, 7, 14, 3, 10, 17, 6, 13, 2, 9, 16, 5, 12, 1, 8, 15,4, 11} 3.223227 1.346 11 {0, 11, 4, 15, 8, 1, 12, 5, 16, 9, 2, 13, 6,17, 10, 3, 14, 7} 3.243854 1.3 13 {0, 13, 8, 3, 16, 11, 6, 1, 14, 9, 4,17, 12, 7, 2, 15, 10, 5} 3.247967 1.262 17 {0, 17, 16, 15, 14, 13, 12,11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1} 3.245911 1.371

As another example, for the length-24 CGS, when {1, 5, 7, 11, 13, 17,19, 23}, which are coprime to 24, and {2, 3}, which is a control group,are used as deltas, the CS value and PAPR/CM performance for eachrepetition may be obtained as shown in FIG. 29 . Here, the CS value foreach repetition means a CS value in the n-th sequence when the length-24CGS is repeated N times (where n=1, 2, 3,..., N). In this case, the CSvalue in the n-th repeated sequence may be obtained as ((n-1)*delta) mod(sequence length). For example, when delta is 5, the CS value in thesixth repeated sequence is (6-1)*5 mod 24 = 1.

As a result, performance is found good when {1, 5, 7, 11, 13, 17, 19,23}, which are coprime to sequence length 24, are selected as delta, andperformance is found better when 13 is selected as delta than when theother values are selected. Therefore, when the length-24 CGS isrepeatedly transmitted, one of the CS values {1, 5, 7, 11, 13, 17, 19,23} may be used. Specifically, the CS value of 13 may be used.

Table 29 Delta CS value for each repetition PAPR (dB) CM (dB) 1 {0, 1,2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,22, 23} 3.183764 1.293 2 {0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 0,2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22} 5.518768 4.038 3 {0, 3, 6, 9,12, 15, 18, 21, 0, 3, 6, 9, 12, 15, 18, 21, 0, 3, 6, 9, 12, 15, 18, 21}6.766479 6.865 5 {0, 5, 10, 15, 20, 1, 6, 11, 16, 21, 2, 7, 12, 17, 22,3, 8, 13, 18, 23, 4, 9, 14, 19} 3.229425 1.276 7 {0, 7, 14, 21, 4, 11,18, 1, 8, 15, 22, 5, 12, 19, 2, 9, 16, 23, 6, 13, 20, 3, 10, 17}3.243854 1.306 11 {0, 11, 22, 9, 20, 7, 18, 5, 16, 3, 14, 1, 12, 23, 10,21, 8, 19, 6, 17, 4, 15, 2, 13} 3.22736 1.261 13 {0, 13, 2, 15, 4, 17,6, 19, 8, 21, 10, 23, 12, 1, 14, 3, 16, 5, 18, 7, 20, 9, 22, 11} 3.175411.22 17 {0, 17, 10, 3, 20, 13, 6, 23, 16, 9, 2, 19, 12, 5, 22, 15, 8, 1,18, 11, 4, 21, 14, 7} 3.239736 1.297 19 {0, 19, 14, 9, 4, 23, 18, 13, 8,3, 22, 17, 12, 7, 2, 21, 16, 11, 6, 1, 20, 15, 10, 5} 3.239736 1.297 23{0, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6,5, 4, 3, 2, 1} 3.190019 1.273

[Method 2] A Method for Setting the Starting CS Value When CGS isRepeatedly Transmitted More Times Than the Sequence Length

It has been described above that when the length-12 CGS is repeatedlytransmitted in the frequency domain, a CS value may be set differentlyfor each repeatedly transmitted sequence in order to enhance PAPR/CMperformance. In this regard, it has been described above that 5 used inthe existing standard may be reused as a value of delta. PAPR/CMperformance obtained while maintaining delta as 5 when the length-12 CGSis repeatedly transmitted up to 35 times is shown in FIG. 17 . Referringto FIG. 17 , when the number of repeated transmissions is equal orsimilar to the sequence length, that is, when many different CS valuesare maintained, a gain may be obtained in terms of PAPR/CM performance.Regarding the CS value for each repeated transmission when repeatedtransmission is performed 35 times, which has the worst performance, thesame CS value is obtained for every 12th sequence in the form of {0, 5,10, 3, 8, 1, 6, 11, 4, 9, 2, 7, 0, 5, 10, 3, 8, 1, 6, 11, 4, 9, 2, 7, 0,5, 10, 3, 8, 1, 6, 11, 4, 9, 2}.

Methods proposed below are based on the length-12 CGS as an example.Similar methods may be applied to length-6, length-18, and length-24CGSs.

As a first configuration method, a new value of delta may be appliedafter every specific number of repetitions (e.g., repeated transmissionis performed as many times as an integer multiple of the sequencelength). That is, a new delta value may be applied whenever repeatedtransmission is performed as many times as an integer multiple of thesequence length. when a length-L sequence is repeated, a first deltavalue may be used for the first L repeated transmissions, a second deltavalue may be used for the L+1-th to 2L-th repeated transmissions, and athird delta value may be used for the 2L+1-th to 3L-th repeatedtransmissions.

As an example, referring to the result of FIG. 18 , when the length-12CGS is repeated 35 times, delta 5, which is the first delta, may be usedfor the first 12 repeated transmissions, delta 7 may be used for the13th to 24th repeated transmissions, and delta 1 may be used for the25th to 36th repeated transmissions. As another example, referring tothe result of FIG. 18 , when the length-12 CGS is repeated 24 times,delta 5, which is the first delta, may be used for the first 12 repeatedtransmissions, and delta 1 may be used for the 13th to 24th repeatedtransmissions.

As another configuration method, a phase shift pattern may be appliedtogether with or separately from the CS values using the delta.Specifically, a phase shift pattern may be applied in a sequence level.FIG. 19 may show performance obtained when the phase shift is applied inthe pattern of [1, 1, -1] and the pattern of [1, -1, -1] (In this case,a configuration may be established such that the phase shift occurs by{0, π/4, 2π/4, 3π/4} in order of {1, 0+1i, -1, 0-1i}). Here, each phaseshift value is applied in the sequence level (i.e., the value is changedevery 12 PRBs).

It may be seen from the actual experimental results that the PAPR/CMperformance is improved compared to the method in which the delta ischanged when the number of PRBs is 28 or more. Accordingly, when thenumber of PRBs is greater than or equal to a specific value (e.g., 28),a sequence-level phase shift may be considered. In this case, the phaseshift values to be applied are [1, 1, -1] or [1, -1, -1].

As another configuration method, the sequence mapping order may bechanged together with or separately from the CS values using the delta.As an example, the mapping order may be inversely applied in thesequence level. the PAPR/CM performance obtained when the mapping orderis applied differently in the sequence level is shown in FIG. 20 . Inthis case, mapping may be performed in normal order for up to 24, thenumber of PRBs (i.e., 2 repetitions of sequence transmission), and maybe inversely performed from 25, the number of PRBs (i.e., from the thirdrepeated transmission of the sequence). It may be seen that the PAPR/CMperformance is improved when the inverse mapping is used compared to thecase where mapping is always performed in the normal order. Accordingly,the inverse mapping scheme may be considered to improve PAPR/CMperformance.

[Method 3-3-3] Configuring One of Use of a Single ZC Sequence andRepetitive Transmission of a CGS as a Sequence of PUCCH Format 0/1According to the Size of the Frequency Domain Region

FIG. 21 shows PAPR/CM performance obtained when the method of repeatedlytransmitting a length-12 CGS sequence and the method of using a singleZC sequence are used for PUCCH format 0/1 according to the PUCCHresource size in the frequency domain. Although the method of changingonly the delta value (i.e., CS) is considered in the repeatedtransmission of CGS mentioned below, the other methods mentioned abovemay also be used.

In terms of PAPR, when 13, 14, and 15 PRBs are used for PRBs for PUCCHresources, repeated transmission of length-12 CGS (delta = 5, 5, 5) hasgood performance. In terms of CM, when the number of PRBs used for PUCCHresources is 9, 10,..., or 24, repeated transmission of length-12 CGS(delta = 5, 5, 5) has good performance.

Therefore, the following method may be proposed according to theexperimental results.

1. When the PUCCH resource size in the frequency domain for PUCCH format0/1 is less than or equal to M PRBs, a CGS may be repeatedlytransmitted. When the size exceeds M PRBs, a single ZC sequence may beused.

1-A. For example, when M is 24, if a region smaller than 24 PRBs isallocated as resources for PUCCH format 0/1, the length-12 CGS may berepeatedly transmitted. If a region larger than 24 PRBs is allocated asresources for PUCCH format 0/1, a single ZC sequence may be used.

1-A-i. In this regard, when the length-12 CGS is repeatedly transmitted,the delta value to be used may be 5.

2. When the PUCCH resource size in the frequency domain for PUCCH format0/1 is included in a specific range (i.e., the size is greater than orequal to X PRBs and less than or equal to Y PRBs), a CGS may berepeatedly transmitted. In other range, a single ZC sequence may beused.

2-A. As an example, in the case where the specific range is from 9 PRBsto 24 PRBs, when a region larger than or equal to 9 PRBs and smallerthan or equal to 24 PRBs is allocated as a resource for PUCCH format0/1, the length-12 CGS may be repeatedly transmitted. When a regionsmaller than 9 PRBs or larger than 24 PRBs is allocated as a resourcefor PUCCH format 0/1, a single ZC sequence may be used.

2-A-i. In this regard, when the length-12 CGS is repeatedly transmitted,the delta value to be used may be 5.

3. The BS may configure/indicate whether to use a single ZC sequence orto repeatedly transmit a CGS for each PUCCH resource for PUCCH format0/1.

3-A. As an example, when the BS determines that the performance will begood when a single ZC sequence is used for the frequency domain amountof the PUCCH resource, it may configure/indicate use of the single ZCsequence. when the BS determines that the performance will be good whena CGS is repeatedly transmitted for the frequency domain amount of thePUCCH resource, it may configure/indicate repeated transmission of theCSG.

3-B. The UE may transmit PUCCH format 0/1 through the selected PUCCHresource using the sequence transmission method configured/indicated bythe BS.

Cyclic shift cycling used for PUCCH format 0/1 in NR-U is limited to theinterlace structure. That is, as described in section 6.3.2.2.2 of 3GPPTS 38.211, m_(int) of the N-th PRB (where N=0, 1,...,9 (or 10)) amongthe PRBs allocated as interlaced resources is N*5, and is used to changethe CS.

However, in the above 52.6 GHz band, the following operation may berequired because the interlace structure is not considered, but thecontiguous PRB structure is considered.

The operation proposed below is basically a method of mapping m_(int) toa CS value with a difference of a specific delta (e.g., 5) according tothe PRB index order in all methods.

[Proposed method 3-3-3A] Calculating Mint by Pre-Allocating a LogicalIndex Within PUCCH Resources (e.g., A Total of N Resources) Allocated bythe BS

A. As a first example, for each hop among PUCCH resources, the PRBlocated at the lowest position in the frequency domain is set to PRBindex 0, and the PRB located at the highest position is set to indexN-1.

A-i. In other words, in this method, the starting PUCCH RB indexconfigured/indicated by the BS is ^(nµ PUCCH PRB) =0 and ^(nµ PUCCH PRB)is increased by 1 whenever the RB index increases by 1.

B. As a second example, for each hop among PUCCH resources, the PRBlocated at the highest position in the frequency domain is set to PRBindex 0, and the PRB located at the lowest position is set to index N-1.

B-i. In other words, in this method, the ending PUCCH RB indexconfigured/indicated by the BS is ^(nµ PUCCH PRB) =0 and ^(nµ PUCCH PRB)is decreased by 1 whenever the RB index decreases by 1.

C. The above two examples may be configured/applied individually or incombination according to frequency hopping.

C-i. For example, the first example may be applied to the lower hop, andthe second example may be applied to the upper hop. Alternatively, thesecond example may be applied to the lower hop, and the first examplemay be applied to the upper hop. Alternatively, the same example may beapplied to both hops (i.e., lower hop & upper hop).

D. As a third example, for both hops (lower hop & upper hop) that may beoccupied by PUCCH resources, the PRB located at the lowest position inthe frequency domain is set to PRB index 0, and the PRB located at thehighest position is set to index 2N-1.

D-i. In other words, in this example, the starting PUCCH RB indexconfigured/indicated by the BS is set to ^(nµ PUCCH PRB) =0, and^(nµ PUCCH PRB) is increased by 1 whenever the RB index increases by 1.The last RB index of the lower hop is ^(nµ PUCCH PRB) =N-1.Subsequently, the first RB index of the upper hop is set to^(nµ PUCCH PRB) =N, and ^(nµ PUCCH PRB) is increased by 1 whenever theRB index increases by 1. The last RB index of the upper hop is^(nµ PUCCH PRB) =2N-1.

E. As a fourth example, for both hops (lower hop & upper hop) that maybe occupied by the PUCCH resources, the PRB located at the highestposition in the frequency domain is set to PRB index 0. The PRB locatedat the lowest position is set to index 2N-1.

E-i. In other words, in this example, the starting PUCCH RB indexconfigured/indicated by the BS is set to ^(nµ PUCCH PRB) =2N-1, and^(nµ PUCCH PRB) =2N-1 is decreased by 1 whenever the RB index increasesby 1. The last RB index of the lower hop is ^(nµ PUCCH PRB) =N.Subsequently, the first RB index of the upper hop is set to^(nµ PUCCH PRB) =N-1, and ^(nµ PUCCH PRB) is decreased by 1 whenever theRB index increases by 1. The last RB index of the upper hop is^(nµ PUCCH PRB) =0.

F. As a result, m_(int) may be delta * ^(nµ PUCCH PRB) .Here,^(nµ PUCCH PRB) may be a logical PRB index in a predetermined PUCCHresource as in the above example.

F-i. When a parameter in the existing spec is reused, ^(nµ PUCCH PRB) inthe example above may be replaced with ^(nµ IRB) .

G. With this method, the BS may appropriately indicate the value of m₀for each PUCCH resource in order to use misaligned RB allocation.

H. Configuring this method according to a scheme most similar to that ofNR-U (i.e., a method in which a CS value is set differently according tothe PRB order in the entire PUCCH resource)

[Proposed method 3-3-3B] Calculating Mint Based on a Physical Index(e.g., CRB Index or PRB Index in a BWP) Corresponding to the PUCCHResource Allocated by the BS

A. As an example, based on the CRB index, m_(int) may be mint = delta *^(nµ CRB)

B. As another example, based on the PRB index in the BWP, m_(int) may bemint = delta * ^(nµ PRB)

C. With this method, additional signaling may not be required for the BSto use misaligned RB allocation.

As proposed above, when the delta value is changed for every specificnumber of PRBs (e.g., 2 PRBs in the case of L12-CGS), the changed deltavalue may also be applied to the proposed methods A and B for everyspecific number of PRBs.

Additionally, the methods proposed for PUCCH transmission may be equallyapplied to resource configuration of other UL signals/channels (e.g.,SRS, etc.). As an example, in configuring resources for SRStransmission, the BS may indicate the above proposed methods to the UE,and the UE may transmit SRS according to the indicated method.

In addition, examples of the above-described proposed methods may alsobe included as one of the implementation methods of the presentdisclosure, and therefore it is apparent that they may be regarded as akind of proposed methods. In addition, the above-described proposedmethods may be implemented independently, or may be implemented bycombining (or merging) some of the proposed methods. A rule may bedefined such that the BS may provide the UE with information aboutwhether the proposed methods are to be applied (or information about therules of the proposed methods) through a predefined signal (e.g., aphysical layer signal or a higher layer signal). The higher layer mayinclude, for example, one or more of functional layers such as MAC, RLC,PDCP, RRC, and SDAP.

Methods, embodiments or descriptions for implementing the methodproposed in the present disclosure may be applied separately, or one ormore of the methods (or embodiments or descriptions) may be applied incombination.

Implementation

FIG. 22 is a flowchart of a signal transmission/reception methodaccording to embodiments of the present disclosure.

Referring to FIG. 22 , the embodiments of the present disclosure may becarried out by a UE, and may include an operation S1801 of determining aPUCCH resource for transmitting a PUCCH (S1801) and an operation S1803of transmitting the PUCCH through the PUCCH resource.

Here, the PUCCH resource may be configured based on a combination of oneor more of the structures proposed through Sections 3.1 to 3.3.

For example, referring to the structure proposed in Section 3.2, one ofthe 16 PUCCH resource sets in FIG. 12 may be selected, and the PUCCHresource may be determined as one of 16 PUCCH resources (r_(PUCCH)) inthe selected PUCCH resource set.

The PUCCH resource sets of FIG. 12 are for PUCCH resource sets beforededicated PUCCH resource configuration, that is, initial resource sets.Referring to the conventional document 3 GPP TS 38.213, using the PUCCHresource sets by the UE before the dedicated PUCCH resourceconfiguration means using the PUCCH resource sets based on a commonPUCCH resource configuration (pucch-ResourceCommon). In other words, itmeans that the UE uses PUCCH sets while the UE does not have dedicatedPUCCH resource configuration. The PUCCH resource sets before thededicated PUCCH resource configuration may be expressed as PUCCHresource sets prior to RRC configuration.

Referring to method 3-2-1-A in Section 3.2, the number of PRBs per PUCCHresources may be transmitted through higher layer signaling transmittedby the BS, for example, SIB.

Specifically, referring to Section 3.2, the BS indicates the minimumnumber of PRBs to the UE in consideration of the BW size, etc., and theUE configures frequency resources within the BW, considering the minimumnumber of PRBs as the number of PRBs per PUCCH resource.

For example, the BS indicates # of PRBs, i.e., the minimum number ofPRBs in the configurations of Tables 25 and/or 26, through the SIB.Referring to the description in section 3.2 and Table 14, the # of PRBsin Tables 25 and/or 26 is the minimum PRB in Table 14 in Section 3.1,and the minimum PRB may be allocated to one PUCCH resource in Method3-2-1. Referring to Method 3-2-1-A, # of PRBs in Tables 14, 25 and 26are examples in consideration of regulations in each country, and the BSmay determine the value of # of PRBs and indicate the same through theSIB. Therefore, in Method 3-2-1-A, the minimum number of PRBs indicatedby the BS through the SIB is the same as the number of PRBs included inone PUCCH resource used when the UE transmits the PUCCH.

Referring to Section 3.2, the PUCCH resources described in this sectionare related to PUCCH resources included in the PUCCH resource set beforethe dedicated PUCCH resource configuration associated with FIG. 12 (fora case where a dedicated PUCCH resource is not configured). Therefore,the BS may transmit information on the number of PRBs through the SIBbefore configuring a dedicated PUCCH resource for the UE.

Referring to Section 3.1, when the minimum number of PRBs is set, a longsequence corresponding to the minimum number of PRBs is used for thePUCCH. For example, the UE may use one sequence corresponding to thenumber of PRBs per PUCCH resource configured by the SIB in generatingthe PUCCH.

Referring to Method 3-2-1-A, the PUCCH resource may be a resource forthe PUCCH, which may be one of PUCCH formats 0 and 1.

Referring to Method 3-2-1-A, the UE does not expect that an invalidPUCCH resource is indicated by the BS. For example, an invalid resourceamong the 16 PUCCH resources included in the PUCCH resource set may notbe allocated to the UE.

A method of determining whether a PUCCH resource is valid is disclosedin Methods 3-2-1 and 3-2-1-A. For example, the number of frequencyresources that may be FDMed in a bandwidth may be calculated based onthe number of PRBs of the PUCCH resource indicated by the BS and thetotal number of RBs in the bandwidth. The number of valid PUCCHresources may be determined based on the calculated number of frequencyresources that may be FDMed and the number of CS indexes included in theset of initial CS indexes for each index of FIG. 12 (for each PUCCHresource set). More specifically, the product of the number of resourcesthat may be FDMed and the number of CS indexes may be the number ofvalid PUCCH resources.

In addition to the operations described with reference to FIG. 22 , oneor more of the operations described with reference to FIGS. 1 to 21and/or the operations described with reference to sections 1 to 3 may becombined and additionally performed. For example, the UE may performuplink LBT before transmission of the PUCCH.

Example of Communication System to Which the Present Disclosure isApplied

The various descriptions, functions, procedures, proposals, methods,and/or operation flowcharts of the present disclosure described hereinmay be applied to, but not limited to, various fields requiring wirelesscommunication/connectivity (e.g., 5 G) between devices.

More specific examples will be described below with reference to thedrawings. In the following drawings/description, like reference numeralsdenote the same or corresponding hardware blocks, software blocks, orfunction blocks, unless otherwise specified.

FIG. 23 illustrates a communication system 1 applied to the presentdisclosure.

Referring to FIG. 23 , the communication system 1 applied to the presentdisclosure includes wireless devices, BSs, and a network. A wirelessdevice is a device performing communication using radio accesstechnology (RAT) (e.g., 5 G NR (or New RAT) or LTE), also referred to asa communication/radio/5G device. The wireless devices may include, notlimited to, a robot 100 a, vehicles 100 b-1 and 100 b-2, an extendedreality (XR) device 100 c, a hand-held device 100 d, a home appliance100 e, an IoT device 100 f, and an artificial intelligence (AI)device/server 400. For example, the vehicles may include a vehiclehaving a wireless communication function, an autonomous driving vehicle,and a vehicle capable of vehicle-to-vehicle (V2V) communication. Herein,the vehicles may include an unmanned aerial vehicle (UAV) (e.g., adrone). The XR device may include an augmented reality (AR)/virtualreality (VR)/mixed reality (MR) device and may be implemented in theform of a head-mounted device (HMD), a head-up display (HUD) mounted ina vehicle, a television (TV), a smartphone, a computer, a wearabledevice, a home appliance, a digital signage, a vehicle, a robot, and soon. The hand-held device may include a smartphone, a smart pad, awearable device (e.g., a smart watch or smart glasses), and a computer(e.g., a laptop). The home appliance may include a TV, a refrigerator, awashing machine, and so on. The IoT device may include a sensor, a smartmeter, and so on. For example, the BSs and the network may beimplemented as wireless devices, and a specific wireless device 200 amay operate as a BS/network node for other wireless devices.

The wireless devices 100 a to 100 f may be connected to the network 300via the BSs 200. An AI technology may be applied to the wireless devices100 a to 100 f, and the wireless devices 100 a to 100 f may be connectedto the AI server 400 via the network 300. The network 300 may beconfigured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g.,NR) network. Although the wireless devices 100 a to 100 f maycommunicate with each other through the BSs 200/network 300, thewireless devices 100 a to 100 f may perform direct communication (e.g.,sidelink communication) with each other without intervention of theBSs/network. For example, the vehicles 100 b-1 and 100 b-2 may performdirect communication (e.g., V2V/vehicle-to-everything (V2X)communication). The IoT device (e.g., a sensor) may perform directcommunication with other IoT devices (e.g., sensors) or other wirelessdevices 100 a to 100 f.

Wireless communication/connections 150 a, 150 b, and 150 c may beestablished between the wireless devices 100 a to 100 f/BS 200 andbetween the BSs 200. Herein, the wireless communication/connections maybe established through various RATs (e.g., 5G NR) such as UL/DLcommunication 150 a, sidelink communication 150 b (or, D2Dcommunication), or inter-BS communication (e.g., relay or integratedaccess backhaul (IAB)). Wireless signals may be transmitted and receivedbetween the wireless devices, between the wireless devices and the BSs,and between the BSs through the wireless communication/connections 150a, 150 b, and 150 c. For example, signals may be transmitted and receivedon various physical channels through the wirelesscommunication/connections 150 a, 150 b and 150 c. To this end, at leasta part of various configuration information configuring processes,various signal processing processes (e.g., channel encoding/decoding,modulation/demodulation, and resource mapping/demapping), and resourceallocation processes, for transmitting/receiving wireless signals, maybe performed based on the various proposals of the present disclosure.

Example of Wireless Device to Which the Present Disclosure is Applied

FIG. 24 illustrates wireless devices applicable to the presentdisclosure.

Referring to FIG. 24 , a first wireless device 100 and a second wirelessdevice 200 may transmit wireless signals through a variety of RATs(e.g., LTE and NR). { The first wireless device 100 and the secondwireless device 200} may correspond to {the wireless device 100 x andthe BS 200} and/or {the wireless device 100 x and the wireless device100 x} of FIG. 23 .

The first wireless device 100 may include one or more processors 102 andone or more memories 104, and further include one or more transceivers106 and/or one or more antennas 108. The processor(s) 102 may controlthe memory(s) 104 and/or the transceiver(s) 106 and may be configured toimplement the descriptions, functions, procedures, proposals, methods,and/or operation flowcharts disclosed in this document. For example, theprocessor(s) 102 may process information in the memory(s) 104 togenerate first information/signals and then transmit wireless signalsincluding the first information/signals through the transceiver(s) 106.The processor(s) 102 may receive wireless signals including secondinformation/signals through the transceiver(s) 106 and then storeinformation obtained by processing the second information/signals in thememory(s) 104. The memory(s) 104 may be connected to the processor(s)102 and may store various pieces of information related to operations ofthe processor(s) 102. For example, the memory(s) 104 may store softwarecode including instructions for performing all or a part of processescontrolled by the processor(s) 102 or for performing the descriptions,functions, procedures, proposals, methods, and/or operation flowchartsdisclosed in this document. The processor(s) 102 and the memory(s) 104may be a part of a communication modem/circuit/chip designed toimplement RAT (e.g., LTE or NR). The transceiver(s) 106 may be connectedto the processor(s) 102 and transmit and/or receive wireless signalsthrough the one or more antennas 108. Each of the transceiver(s) 106 mayinclude a transmitter and/or a receiver. The transceiver(s) 106 may beinterchangeably used with radio frequency (RF) unit(s). In the presentdisclosure, the wireless device may be a communicationmodem/circuit/chip.

The second wireless device 200 may include one or more processors 202and one or more memories 204, and further include one or moretransceivers 206 and/or one or more antennas 208. The processor(s) 202may control the memory(s) 204 and/or the transceiver(s) 206 and may beconfigured to implement the descriptions, functions, procedures,proposals, methods, and/or operation flowcharts disclosed in thisdocument. For example, the processor(s) 202 may process information inthe memory(s) 204 to generate third information/signals and thentransmit wireless signals including the third information/signalsthrough the transceiver(s) 206. The processor(s) 202 may receivewireless signals including fourth information/signals through thetransceiver(s) 106 and then store information obtained by processing thefourth information/signals in the memory(s) 204. The memory(s) 204 maybe connected to the processor(s) 202 and store various pieces ofinformation related to operations of the processor(s) 202. For example,the memory(s) 204 may store software code including instructions forperforming all or a part of processes controlled by the processor(s) 202or for performing the descriptions, functions, procedures, proposals,methods, and/or operation flowcharts disclosed in this document. Theprocessor(s) 202 and the memory(s) 204 may be a part of a communicationmodem/circuit/chip designed to implement RAT (e.g., LTE or NR). Thetransceiver(s) 206 may be connected to the processor(s) 202 and transmitand/or receive wireless signals through the one or more antennas 208.Each of the transceiver(s) 206 may include a transmitter and/or areceiver. The transceiver(s) 206 may be interchangeably used with RFunit(s). In the present disclosure, the wireless device may be acommunication modem/circuit/chip.

Now, hardware elements of the wireless devices 100 and 200 will bedescribed in greater detail. One or more protocol layers may beimplemented by, not limited to, one or more processors 102 and 202. Forexample, the one or more processors 102 and 202 may implement one ormore layers (e.g., functional layers such as physical (PHY), mediumaccess control (MAC), radio link control (RLC), packet data convergenceprotocol (PDCP), RRC, and service data adaptation protocol (SDAP)). Theone or more processors 102 and 202 may generate one or more protocoldata units (PDUs) and/or one or more service data Units (SDUs) accordingto the descriptions, functions, procedures, proposals, methods, and/oroperation flowcharts disclosed in this document. The one or moreprocessors 102 and 202 may generate messages, control information, data,or information according to the descriptions, functions, procedures,proposals, methods, and/or operation flowcharts disclosed in thisdocument and provide the messages, control information, data, orinformation to one or more transceivers 106 and 206. The one or moreprocessors 102 and 202 may generate signals (e.g., baseband signals)including PDUs, SDUs, messages, control information, data, orinformation according to the descriptions, functions, procedures,proposals, methods, and/or operation flowcharts disclosed in thisdocument and provide the generated signals to the one or moretransceivers 106 and 206. The one or more processors 102 and 202 mayreceive the signals (e.g., baseband signals) from the one or moretransceivers 106 and 206 and acquire the PDUs, SDUs, messages, controlinformation, data, or information according to the descriptions,functions, procedures, proposals, methods, and/or operation flowchartsdisclosed in this document.

The one or more processors 102 and 202 may be referred to ascontrollers, microcontrollers, microprocessors, or microcomputers. Theone or more processors 102 and 202 may be implemented by hardware,firmware, software, or a combination thereof. For example, one or moreapplication specific integrated circuits (ASICs), one or more digitalsignal processors (DSPs), one or more digital signal processing devices(DSPDs), one or more programmable logic devices (PLDs), or one or morefield programmable gate arrays (FPGAs) may be included in the one ormore processors 102 and 202. The descriptions, functions, procedures,proposals, methods, and/or operation flowcharts disclosed in thisdocument may be implemented using firmware or software, and the firmwareor software may be configured to include the modules, procedures, orfunctions. Firmware or software configured to perform the descriptions,functions, procedures, proposals, methods, and/or operation flowchartsdisclosed in this document may be included in the one or more processors102 and 202 or may be stored in the one or more memories 104 and 204 andexecuted by the one or more processors 102 and 202. The descriptions,functions, procedures, proposals, methods, and/or operation flowchartsdisclosed in this document may be implemented using firmware or softwarein the form of code, an instruction, and/or a set of instructions.

The one or more memories 104 and 204 may be connected to the one or moreprocessors 102 and 202 and store various types of data, signals,messages, information, programs, code, instructions, and/or commands.The one or more memories 104 and 204 may be configured to includeread-only memories (ROMs), random access memories (RAMs), electricallyerasable programmable read-only memories (EPROMs), flash memories, harddrives, registers, cash memories, computer-readable storage media,and/or combinations thereof. The one or more memories 104 and 204 may belocated at the interior and/or exterior of the one or more processors102 and 202. The one or more memories 104 and 204 may be connected tothe one or more processors 102 and 202 through various technologies suchas wired or wireless connection.

The one or more transceivers 106 and 206 may transmit user data, controlinformation, and/or wireless signals/channels, mentioned in the methodsand/or operation flowcharts of this document, to one or more otherdevices. The one or more transceivers 106 and 206 may receive user data,control information, and/or wireless signals/channels, mentioned in thedescriptions, functions, procedures, proposals, methods, and/oroperation flowcharts disclosed in this document, from one or more otherdevices. For example, the one or more transceivers 106 and 206 may beconnected to the one or more processors 102 and 202 and transmit andreceive wireless signals. For example, the one or more processors 102and 202 may perform control so that the one or more transceivers 106 and206 may transmit user data, control information, or wireless signals toone or more other devices. The one or more processors 102 and 202 mayperform control so that the one or more transceivers 106 and 206 mayreceive user data, control information, or wireless signals from one ormore other devices. The one or more transceivers 106 and 206 may beconnected to the one or more antennas 108 and 208 and the one or moretransceivers 106 and 206 may be configured to transmit and receive userdata, control information, and/or wireless signals/channels, mentionedin the descriptions, functions, procedures, proposals, methods, and/oroperation flowcharts disclosed in this document, through the one or moreantennas 108 and 208. In this document, the one or more antennas may bea plurality of physical antennas or a plurality of logical antennas(e.g., antenna ports). The one or more transceivers 106 and 206 mayconvert received wireless signals/channels from RF band signals intobaseband signals in order to process received user data, controlinformation, and wireless signals/channels using the one or moreprocessors 102 and 202. The one or more transceivers 106 and 206 mayconvert the user data, control information, and wirelesssignals/channels processed using the one or more processors 102 and 202from the baseband signals into the RF band signals. To this end, the oneor more transceivers 106 and 206 may include (analog) oscillators and/orfilters.

Example of Use of Wireless Device to Which the Present Disclosure isApplied

FIG. 25 illustrates another example of a wireless device applied to thepresent disclosure. The wireless device may be implemented in variousforms according to a use case/service (refer to FIG. 23 ).

Referring to FIG. 25 , wireless devices 100 and 200 may correspond tothe wireless devices 100 and 200 of FIG. 24 and may be configured toinclude various elements, components, units/portions, and/or modules.For example, each of the wireless devices 100 and 200 may include acommunication unit 110, a control unit 120, a memory unit 130, andadditional components 140. The communication unit 110 may include acommunication circuit 112 and transceiver(s) 114. For example, thecommunication circuit 112 may include the one or more processors 102 and202 and/or the one or more memories 104 and 204 of FIG. 24 . Forexample, the transceiver(s) 114 may include the one or more transceivers106 and 206 and/or the one or more antennas 108 and 208 of FIG. 24 . Thecontrol unit 120 is electrically connected to the communication unit110, the memory 130, and the additional components 140 and providesoverall control to the wireless device. For example, the control unit120 may control an electric/mechanical operation of the wireless devicebased on programs/code/instructions/information stored in the memoryunit 130. The control unit 120 may transmit the information stored inthe memory unit 130 to the outside (e.g., other communication devices)via the communication unit 110 through a wireless/wired interface orstore, in the memory unit 130, information received through thewireless/wired interface from the outside (e.g., other communicationdevices) via the communication unit 110.

The additional components 140 may be configured in various mannersaccording to type of the wireless device. For example, the additionalcomponents 140 may include at least one of a power unit/battery,input/output (I/O) unit, a driving unit, and a computing unit. Thewireless device may be implemented in the form of, not limited to, therobot (100 a of FIG. 19 ), the vehicles (100 b-1 and 100 b-2 of FIG. 23), the XR device (100 c of FIG. 23 ), the hand-held device (100 d ofFIG. 23 ), the home appliance (100 e of FIG. 23 ), the IoT device (100 fof FIG. 23 ), a digital broadcasting terminal, a hologram device, apublic safety device, an MTC device, a medical device, a FinTech device(or a finance device), a security device, a climate/environment device,the AI server/device (400 of FIG. 23 ), the BSs (200 of FIG. 23 ), anetwork node, or the like. The wireless device may be mobile or fixedaccording to a use case/service.

In FIG. 25 , all of the various elements, components, units/portions,and/or modules in the wireless devices 100 and 200 may be connected toeach other through a wired interface or at least a part thereof may bewirelessly connected through the communication unit 110. For example, ineach of the wireless devices 100 and 200, the control unit 120 and thecommunication unit 110 may be connected by wire and the control unit 120and first units (e.g., 130 and 140) may be wirelessly connected throughthe communication unit 110. Each element, component, unit/portion,and/or module in the wireless devices 100 and 200 may further includeone or more elements. For example, the control unit 120 may beconfigured with a set of one or more processors. For example, thecontrol unit 120 may be configured with a set of a communication controlprocessor, an application processor, an electronic control unit (ECU), agraphical processing unit, and a memory control processor. In anotherexample, the memory 130 may be configured with a RAM, a dynamic RAM(DRAM), a ROM, a flash memory, a volatile memory, a non-volatile memory,and/or a combination thereof.

Example of Vehicle or Autonomous Driving Vehicle to Which the PresentDisclosure is Applied

FIG. 26 illustrates a vehicle or an autonomous driving vehicle appliedto the present disclosure. The vehicle or autonomous driving vehicle maybe implemented as a mobile robot, a car, a train, a manned/unmannedaerial vehicle (AV), a ship, or the like.

Referring to FIG. 26 , a vehicle or autonomous driving vehicle 100 mayinclude an antenna unit 108, a communication unit 110, a control unit120, a driving unit 140 a, a power supply unit 140 b, a sensor unit 140c, and an autonomous driving unit 140 d. The antenna unit 108 may beconfigured as a part of the communication unit 110. The blocks110/130/140 a to 140 d correspond to the blocks 110/130/140 of FIG. 25 ,respectively.

The communication unit 110 may transmit and receive signals (e.g., dataand control signals) to and from external devices such as othervehicles, BSs (e.g., gNBs and road side units), and servers. The controlunit 120 may perform various operations by controlling elements of thevehicle or the autonomous driving vehicle 100. The control unit 120 mayinclude an ECU. The driving unit 140 a may enable the vehicle or theautonomous driving vehicle 100 to drive on a road. The driving unit 140a may include an engine, a motor, a powertrain, a wheel, a brake, asteering device, and so on. The power supply unit 140 b may supply powerto the vehicle or the autonomous driving vehicle 100 and include awired/wireless charging circuit, a battery, and so on. The sensor unit140 c may acquire information about a vehicle state, ambient environmentinformation, user information, and so on. The sensor unit 140 c mayinclude an inertial measurement unit (IMU) sensor, a collision sensor, awheel sensor, a speed sensor, a slope sensor, a weight sensor, a headingsensor, a position module, a vehicle forward/backward sensor, a batterysensor, a fuel sensor, a tire sensor, a steering sensor, a temperaturesensor, a humidity sensor, an ultrasonic sensor, an illumination sensor,a pedal position sensor, and so on. The autonomous driving unit 140 dmay implement technology for maintaining a lane on which the vehicle isdriving, technology for automatically adjusting speed, such as adaptivecruise control, technology for autonomously driving along a determinedpath, technology for driving by automatically setting a route if adestination is set, and the like.

For example, the communication unit 110 may receive map data, trafficinformation data, and so on from an external server. The autonomousdriving unit 140 d may generate an autonomous driving route and adriving plan from the obtained data. The control unit 120 may controlthe driving unit 140 a such that the vehicle or autonomous drivingvehicle 100 may move along the autonomous driving route according to thedriving plan (e.g., speed/direction control). During autonomous driving,the communication unit 110 may aperiodically/periodically acquire recenttraffic information data from the external server and acquiresurrounding traffic information data from neighboring vehicles. Duringautonomous driving, the sensor unit 140 c may obtain information about avehicle state and/or surrounding environment information. The autonomousdriving unit 140 d may update the autonomous driving route and thedriving plan based on the newly obtained data/information. Thecommunication unit 110 may transfer information about a vehicleposition, the autonomous driving route, and/or the driving plan to theexternal server. The external server may predict traffic informationdata using AI technology based on the information collected fromvehicles or autonomous driving vehicles and provide the predictedtraffic information data to the vehicles or the autonomous drivingvehicles.

Those skilled in the art will appreciate that the present disclosure maybe carried out in other specific ways than those set forth hereinwithout departing from the spirit and essential characteristics of thepresent disclosure. The above embodiments are therefore to be construedin all aspects as illustrative and not restrictive. The scope of thedisclosure should be determined by the appended claims and their legalequivalents, not by the above description, and all changes coming withinthe meaning and equivalency range of the appended claims are intended tobe embraced therein.

INDUSTRIAL APPLICABILITY

As described above, the present disclosure is applicable to variouswireless communication systems.

1. A method of transmitting and receiving a signal by a user equipment(UE) operating in a wireless communication system, the methodcomprising: determining a physical uplink control channel (PUCCH)resource for transmitting a PUCCH; and transmitting the PUCCH throughthe PUCCH resource, wherein the PUCCH resource is determined as one ofsixteen PUCCH resources in a PUCCH resource set, wherein the PUCCHresource set is for the UE not having dedicated PUCCH resourceconfiguration, wherein the PUCCH is one of PUCCH formats 0 and 1,wherein the PUCCH resource is configured to multiple physical resourceblocks (PRBs) based on a received system information block (SIB)indicating a number of PRBs, wherein the multiple PRBs are consecutivePRBs in a frequency domain, and wherein the PUCCH resource is configuredto a single PRB based on the received SIB not indicating the number ofPRBs.
 2. The method of claim 1, wherein the PUCCH is generated based onone PUCCH sequence of a length corresponding to the number of PRBs. 3.(canceled)
 4. The method of claim 1, wherein invalid PUCCH resourcesamong the sixteen PUCCH resources are not allocated.
 5. The method ofclaim 4, wherein validity of the PUCCH resource is determined based on:(i) the number of PRBs in the PUCCH resource; (ii) a total number of RBsin a bandwidth; and (iii) a set of initial cyclic shift (CS) indexescorresponding to the PUCCH resource set.
 6. A user equipment (UE) fortransmitting and receiving a signal in a wireless communication system,the UE comprising: at least one transceiver; at least one processor; andat least one memory operably connected to the at least one processor andconfigured to store instructions that, when executed, cause the at leastone processor to perform specific operations, the specific operationscomprising: determining a physical uplink control channel (PUCCH)resource for transmitting a PUCCH; and transmitting the PUCCH throughthe PUCCH resource, wherein the PUCCH resource is determined as one ofsixteen PUCCH resources in a PUCCH resource set, wherein the PUCCHresource set is for the UE not having dedicated PUCCH resourceconfiguration, wherein the PUCCH is one of PUCCH formats 0 and 1,wherein the PUCCH resource is configured to multiple physical resourceblocks (PRBs) based on a received system information block (SIB)indicating a number of PRBs, wherein the multiple PRBs are consecutivePRBs in a frequency domain, and wherein the PUCCH resource is configuredto a single PRB based on the received SIB not indicating the number ofPRBs.
 7. The UE of claim 6, wherein the PUCCH is generated based on onePUCCH sequence of a length corresponding to the number of PRBs. 8.(canceled)
 9. The UE of claim 6, wherein invalid PUCCH resources amongthe sixteen PUCCH resources are not allocated.
 10. The UE of claim 9,wherein validity of the PUCCH resource is determined based on: (i) thenumber of PRBs in the PUCCH resource; (ii) a total number of RBs in abandwidth; and (iii) a set of initial cyclic shift (CS) indexescorresponding to the PUCCH resource set.
 11. A device for a userequipment (UE), the device comprising: at least one processor; and atleast one computer memory operably connected to the at least oneprocessor and configured to cause, when executed, the at least oneprocessor to perform operations, the operations comprising: determininga physical uplink control channel (PUCCH) resource for transmitting aPUCCH; and transmitting the PUCCH through the PUCCH resource, whereinthe PUCCH resource is determined as one of sixteen PUCCH resources in aPUCCH resource set, wherein the PUCCH resource set is for the UE nothaving dedicated PUCCH resource configuration, wherein the PUCCH is oneof PUCCH formats 0 and 1, wherein the PUCCH resource is configured tomultiple physical resource blocks (PRBs)determined based on a receivedsystem information block (SIB) indicating a number of PRBs, wherein themultiple PRBs are consecutive PRBs in a frequency domain, and whereinthe PUCCH resource is configured to a single PRB based on the receivedSIB not indicating the number of PRBs.
 12. The device of claim 11,wherein the PUCCH is generated based on one PUCCH sequence of a lengthcorresponding to the number of PRBs.
 13. (canceled)
 14. The device ofclaim 11, wherein invalid PUCCH resources among the sixteen PUCCHresources are not allocated.
 15. The device of claim 14, whereinvalidity of the PUCCH resource is determined based on: (i) the number ofPRBs in the PUCCH resource; (ii) a total number of RBs in a bandwidth;and (iii) a set of initial cyclic shift (CS) indexes corresponding tothe PUCCH resource set. 16-20. (canceled)